This is great news. The only possible downside is that three-pane applications designed for desktops are not always very usable with a screen rez like the 770's.

I found the approach taken by the person who ported the Pan newsreader to maemo, where panes were replaced by tabs (coming into focus in a natural way), extremely interesting and effective. I think an email client would lend itself to that sort of treatment just as well.