I've basically solved the Landscape versus Portrait problems with Nova-- I am these days using my Pro1 about 95% in Landscape. I pull it from my pocket and just pop it open, whatever I want to do. Nice grip, don't have to worry about curved edges and, at this point, with much practice, easy to do. So I design my Home screen landscape and don't much care what happens in portrait.
I was using Launchtime, which had all apps sorted into category tabs, but it ended up having a few quirks I didn't like. But I loved the scheme-- essentially it was Palm Launcher from Palm OS days. So I designe