Whoops, hold on. iFrames *does* work under OS X. The actual webservice the iFrame was trying to call was unavailable.
This raises the question of a WebServiced world. If one service is down, how do I catch and resolve that? Locally? [Adam Curry: CurryDotCom]
This is a real problem with dynamic content. We had done some work with client-side javascript includes about a year ago that gracefully handled the case of the dynamic-content server being down.
Basically, if the browser couldn't find the source file to include, the table would collapse around an image that was permanently displayed above the dynamic feed. You can see the example here. Look for the "internetsoccer.com" box in the right-hand column of the page.
This works in javascript enabled browsers, but you need some way to format your source file for it to work. I suppose a web service could be configures to write out a file that would be suitable for a javascript client-side include. 12:39:15 PM
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