US Airways has some great offers for last minute getaways at 15,000 miles and $30:
Depart: Friday, May 10 or Saturday, May 11
Return: Sunday, May 12 or Monday, May 13
Book by: May 11
Availability is pretty good, and I like how they allow return on Sunday (instead of Monday or Tuesday) so one doesn't have to lose a work day. There's also an 5,000 miles discount with US Airways credit card. And Gold and higher ...