Every week there is a new post about winrates and bankroll requirements. Maybe this can help some of those posters.
Me and Snow (another swedish 2+2er) have created a page where u can calculate how big bankroll you need (given your BB/100 and Standard deviation). And calculate how much your true, long term, winrate can differ from the one you got right now (given your number of hands, your winrate, your standarddeviation and how sure u want to be (1-100%)
The math behind it is taken from Malmuths
Gambling Theory and Other Topics . A book you should read if u are interested in these sort of things.
http://www.svenskpoker.com/math.php