;-) is an icon that means i winked at you. it is a sideways smiley face made with a ; instead of a :

mwah! is a kiss, as in, "mwah!" kind of like "smooch!"(the sound of a kiss...)

:-X is a kissy smiley face. and...

<):-X is the cowboy kissing you (turn him on his side, you will see it)

but what all of this really means is that i have spent way too much time on these boards!