there is another problem with no limit holdem: say the blinds are 10/20 and i raise 60 (to make it 80) my opponent can't raise less than 60 (to make it at least 140). right now you can always raise the bigblind(20 in this example), but this is incorrect

i dont know if this has been adressed but in headsup-play the button gets to post the small blind and act first preflop.
and you should add some 5/10 no limit tables.. 100BBs is the standart buyin in online poker..