With the never webkit builds on iOS5 and Android ICS finally overflow:scroll works as expected. On iOS you also have the “native” scroll bounce, which is huge IMHO (with bounce I mean the ease when the scrolled viewport reaches the top/end). The app finally feels native, a big step for web apps.
Some time ago I wrote a blog post about fixing slow iTunes backup. The article became the by far most visited one on this blog and we are still getting tons of visitors from google every day. When reading the comments you can see that lots of users seem to have the same/similar problem.