Bikeman, there are still plenty of programs that will continue to accept US players.
You will find a list with these programs at:
http://www.casinoaffiliateprogram.com/gamblingbill.html
And it is perfectly legal to promote the casinos of these affiliate programs. In theory there could be some legal programs for the programs themselves, but there certainly won’t be any legal problems for webmastes. It is not your job to exclude US players, it is the job of the casinos.