So AJAX makes user interaction on web sites much quicker and easier. Instead of refreshing the whole page every time you submit information, just the piece of the page involved gets refreshed, so an AJAX web page acts more like an application on your computer than a normal web page.Why you care
AJAX makes many web sites faster and easier to use. Google Maps was one of the first, and still one of the best, with its ability to drag the map around, search and interact with the map without ever refreshing the page. Netvibes – a customizable home page, is another good one to give you an idea of what we’re talking about. Notice how it lets you edit the title and rearrange the page by dragging and dropping. Any web form or similar user interaction is ripe for AJAX-ification. Take alook at this University of Wisconsin staff directory – start typing a name in the box and watch what happens on the page.AJAX is also enabling the explosion of ‘web applications’ like the ThinkFree online office suite – (see this article for more about online office applications) – or Meebo – a web-based instant messenger application that works with all the major systems.

AJAX and Libraries
For libraries – online AJAX applications can provide access to applications that a particular patron wants to use, but you don’t have. And you don’t have to buy it, install it, or update it. In theory, this could do for applications what the web did for access to information – greatly increase the ability of small libraries to offer access to applications that might otherwise be too expensive. We’ll have to wait to see if that happens.Downsides?
Of course there are also some drawbacks. There are no standards with AJAX, since it is an approach, rather than a technology. And it is new, so there are still issues to be worked out.  For libraries, the biggest issue is probably accessibility. Many AJAX-enabled web sites do not work well with screen readers, and even users with poor sight have difficulties with much of AJAX content out there. The good news is that these issues can be dealt with, and should become less of an issue in the future.
Another current issue is that many AJAX sites and applications work either only, or much better in either Internet Explorer or Firefox. ajaxSKETCH is and example of one of a series of nice applications from the company that work only in Firefox.

So Now What? 
So watch and use what is useful for you and your library for now. And expect in the future you will hear much more, and eventually your own web site, and especially OPAC will be AJAX enabled.

But really, if you already allow flash drives, there is a very simple and straightforward rule you can apply to deciding which cameras you will allow:

If they plug the camera in and it just works, it’s OK. If they need to install software for it to work, then sorry, that is contrary to your PAC usage policy.

I’m assuming that you don’t normally allow patrons to install software on your PAC’s, right? So why allow it for cameras? And since most newer cameras don’t need software to connect, most of your patrons should still be able to transfer their photos.

On the other hand, if this is a common request an even better solution would be to buy a memory card reader. For under $20, you can get one that works with all the popular card formats and works like a flash drive. One of these, either permanently attached to one pc or available to check out, can reduce the headaches caused by patron complaints when their camera won’t talk to your computer. Or if you’re ambitious, for a little more money you can get a card reader that mounts in the computer case like a floppy drive.

1. Don’t be an early adopter (unless you really want to). Wait at least good 6 months after release before you consider upgrading to Vista. More than just possible bugs in Vista itself, I worry about compatibility issues with your existing systems. Think about what would happen if your cataloging system or public access computer security turned out not to work correctly on Vista. How big a headache would that be? And while your vendor may assure you they will be 100% compatible, you know how that can go. Let them work out the glitches on someone else’s library.
2. Do buy Vista-ready hardware. What you should do is assume that any computer you buy now will some day end up running Vista. Any computer you buy in the next year should be what Microsoft calls Vista Premium Ready. If you want to know if any of your current computers will run Vista, Microsoft has a Vista Upgrade Advisor application that will tell you if the computer you run it on can handle Vista, and identify any upgrades it may need to do so.
3. And remember that if you are a public library in the US or Canada, you shouldn’t need to worry as much about the added expense of purchasing a public access computer with XP and then upgrading to Vista later. By taking advantage of the Microsoft Public Library Software Donation Program, you can cut this cost to a small fraction of what it otherwise would be. But remember that this program applies to PACs only.

So how do you plan on dealing with this? Leave your comments here, or post you thoughts in the WJ operating system forum.