I had to "go negative"for a res-I did not have enough points at time I made reservation,but will by the time I stay on this award.MR had no problem with this.
You can buy a certain percentage(10%?)of points to make it to an award level.
Or you could go shopping on the new shoping portal-1000 point bonus for purchases of at least $100
http://www.flyertalk.com/forum/showthread.php?t=454167
Of course the miles will take a few weeks to post.