Its basically a size thing. The resolution I see browsing is 320x396. So if you have images that are 1000px wide, it will suck with side scroll.
It is also hard to input (type) things on a phone, so having a drop down box to select pages, or click able links vs typing in stuff helps.
So you end up with long narrow pages that aren't huge b/w downloads (since most phones aren't as fast as a broadband connection).
If you go to
http://www.redneckpornblog.com/ from a phone, you will see what I mean. The main page is a series of click able links to the blog posts. I already make sure all thumbs are 300px wide or less, so they can see them on mobile without issues.
I'm hoping this ups our traffic from mobile devices, since it will now be friendly to them.