I say hold on to the Delta miles as there are several easy ways to earn more of the same so you can attain a Delta award. Delta is the only airline that only charges 30K miles for a free R/T coach ticket between the continental USA and Hawaii (most other airlines charge 35K) and as someone else already pointed out it is very easy to earn more Skymiles without actually setting foot on Delta metal (Goldpoints and Starwood come to mind).