Taking a trip on DL in two days (with a return in 5 days). I'm CO platinum and AA gold but would like to get a status match on DL or NW (if it's possible to get in 48 hours) and be able to use status on this trip -- among other benefits, would like the baggage allowance (if DL honors it from NW elites, since they don't w/ other partners).

Going forward, obviously will be good to maintain a Sky Team elite membership after CO moves to *A.

Any suggestions as to which airline to approach? Key factors/questions seem to be:
--which of DL or NW is more likely to do a quick match?
--are both matches a once in a lifetime deal? I presume that if I do DL, then I can't do it again when programs merge but if I do NW, I can have a chance at DL later since it will be Skymiles that survies -- anyone agree with that logic?
--Does DL give baggage allowance to NW elite?
--Does DL give other benefits (like upgrades, etc.) to NW elites?
--NW match would probably be platinum and DL would be gold, right?

Would appreciate any insights and advice? Planning to fax to one in a couple of hours to give as much time as possible.

Thanks.