I added an iPhone stylesheet to the site this weekend. I'm using the proper "meta viewport" tags to implement it, so it should work fine on any device supporting that tag. I tested it with Safari and Opera Mini on an iPhone 4. Safari looks great, but Opera Mini seems to want to make the page a little wider than the viewport. I have no idea why, but it might be related to one of the "widgets" I have on the page (Google Reader, Twitter, Delicious, LibraryThing).
Let me know if this blog looks fine or wonky on your device.
I finally deprecated the old RSS 0.91 feed for this blog, and redirected it to the Feedburner Atom feed. I don't think that'll cause problems for anyone, but if it does, just head back to MikeyP.com and re-subscribe using the "Subscribe" button. Alternatively, just use the feed icon in your browser.
The direct feedburner URL is http://feeds2.feedburner.com/mikeyp