Welcome to FT!
Sorry to tell you they just recently shut down the Skymiles Marketplace for those without > GM status or a DL Amex card. DL does not participate in the 3rd party converters like points.com. Unfortunately your skypesos appear to be stranded.
The good news is that last year the changed the rules so that miles don't expire (unless they change the program rules again). Take that trip 3 or 4 times again and you might have enough for a domestic ticket on DL.
EDIT - You may still be able to get Magazine or Newspaper subscriptions. Log into delta.com and select "Skymiles", "Use Miles". You could also donate them to charity.
Last edited by bwhite; Feb 21, 2012 at 4:23 am