My investigations into jquery.com have yielded Shadowbox JS.

Let’s give it a try…
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Well adding the code to the header file as I did on my static site didn’t seem to work. The js kicked in but it didn’t seem to find the target image. A quick google revealed a wordpress plugin So I’ve installed that and we’ll see if it works better…
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That seemed to do it. Now if I add rel=”shadowbox to the href the Shadowbox theme appears. Next is an album. Theoretically if I add rel=”shadowbox[albumname]” to a series of images they will appear as a slide show…
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And rel=”shadowbox[albumname]options={continuous:true,counterType:’skip’,slideshowDelay:3}” gives it a counter with an automatic slide show
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The whole code looks like this (with broken code):

a href="http://macblaze.ca/wp-content/uploads/2009/10/P1050224.jpg" rel="shadowbox[test]options={continuous:true,counterType:'skip',slideshowDelay:3}" >img src="http://macblaze.ca/wp-content/uploads/2009/10/P1050224-150x150.jpg" border="0"/>

a href="http://macblaze.ca/wp-content/uploads/2009/11/P1050257.JPG" rel="shadowbox[test]options={continuous:true,counterType:'skip',slideshowDelay:3}" >img src="http://macblaze.ca/wp-content/uploads/2009/11/P1050257-150x150.jpg" border="0"/>

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Apparently you can also link to websites, which is pretty cool.