1-day auction. Start it Saturday, end it Sunday from 4-5pm PST (7-8EST). That's probably your best window for getting the most possible buyers.
Offer overnight shipping Monday to be delivered Tuesday, or Priority with probable Thursday/Friday delivery. Make sure you point out that only Express Mail is guaranteed by Xmas...people will most likely choose that one.
Insure it and get signature confirmation in case somebody tries to stiff you with a chargeback. Offer a BIN option slightly higher than you hope to get and offer free shipping if they use it.
Since there are so many Wii auctions now, the $19.99 for category featured is a good investment. People will see yours for the whole time it's listed instead of the last 10 minutes. Those tend to get like $75 more. Definitely post a picture of your item, and if you don't feature it, at least bold it.
Hope that helps. I got $420 and $450 for mine (shipped), as a reference, and that was without using the featured option.