Check out the guruplug, it seems to be the next gen Sheeva, it has WiFi amongst many other enhancements.

Thanks, but sounds like there is some heat issues with the guruplug: http://1wt.eu/articles/guruplug-slow-heater/ http://plugcomputer.org/plugforum/index.php?topic=1735.60

They're shipping a fixed version in July to address the heat issues and going to replace the current faulty ones. I ordered one in May but still haven't received it. When I inquired about the status they replied about the heat issue and they were in the process of rolling out a new design to correct it