im a previous lover, overclocker, user of n900.

android > maemo > iOS > BBOS

I bought a samsung galaxy vibrant, hardware wise, it's more powerful than n900 (coz its newer). Rooted and overclocked it with 20+ hours battery life at medium usage, customizable homescreens and stuff.
Multitasking and access to root and linux terminal is great too.

I've been with n900 for like 10 months, and I've loved it til the end. but the perma-brick i got made me switch to android. im in android and im not going back (i just need my files from my n900 though)