Currently running the ulv kernel @ 250/800
conky shows 810 speed and the dmesg | grep WARNING command returns no results.

I'm also trying the other mods mentioned in titan's opening post (egoshin advice, smartflex) and a bunch of other setting (lower screen brightness, turned off un-wanted notifications...etc)

I like the idea of this thread, I for one will be more happy with longer battery life if it meant I don't get to UBER-overclock, for exapmle only get to 700-750 but in exchange get an improved battery life but 25-30, no matter how fast the n900 can be, it's nothing more than an expensive brick once it runs out of juice