as far as offshore online betting, there are only 3 compaines that I would really trust with any amount of money, in this order..
BETWWTs.com
Sportsbetting.com
And the other is Pinnacle something, don't use it that often, but most online people I know swear by it.
Me myself I have used BETWWTS.com since I was 18, haven't had one problem yet... I once made a $500 dollar wager on the phone when their computers were down, ,and won, and I just knew that when their systems were up it wouldn't be credited to my account.. ot my suprise, it was!
I don't use offshore sites as much anymore, but when I do, it's usually betwwts.com