I spent about around 3 hours on github(found the bugs after like 2 hours and spent another 1 playing with wiki markup --- it is sanitized don't bother), 1 hour on bitbucket, 30minutes on gitorious(obviously the bug I found was found very quickly after signing up) and ~1 1/2 hour looking at the launchpad subdomain.

I did this over like the past 100 days.