Id say wait till all the smoke clears and its known when everything will go thru and when CO & UA mileage accts will be merged. No sense having UA status only to find out that the programs wont be together till after '11 when your UA comped status will have runned out
If U wont have the same level with DL in '11 or no status with DL at all for '11, then you would have get a comp before the end of the yr , I wouldnt wait too much past Sept least they ask for a current DL statement and it wont show much if any activity at all