Didn't work for me either at 3:00 CST.
A side note about MyPoints customer service. I've heard all the horror stories, and I don't want to jinx myself, but all but one of my transactions have posted promptly.
For the one that didn't, i received a return (personal) email from MyPoints the same day saying they would look into the problem. The next day I got an apology notice. The next day my points were posted.
Charles