IF Elop & Co. kills MeeGo (as far as Nokia is concerned at least) I may give WebOS another serious look. Seems I'll be left with 3 possible choices once I have to retire my N900:

1. WebOS.
The Good: Will be the closest thing to Maemo/MeeGo/real Linux actually available on a phone. Good OS with a supportive community. Nice UI I can't help but like. Hackable.
The Bad: Not open. Only offered on one company's hardware, which was one of the original reservations I had when switching to Maemo.

2. Android.
The Good: Lotsa apps and hardware to choose from. UI still kinda sucks, but better than by far now than it was on my G1. Hackable.
The Bad: UI still kinda sucks. Not truly open. Not really Linux. Been there, done that, don't miss it a bit. But probably worst of all is the Big Brother aka Google factor.

3. MeeGo.
The Good: Real, open Linux distro. Most capable and adaptable of any mobile OS. Base UI looks ok and a Maemo-style UI would rock. Possibility of availability on a variety of hardware.
The Bad: Nothing actually on the market, iffy future. Gotta wait and see and hope my N900 doesn't break before a suitable MeeGo device is available.

Tough situation...