I'm doing pretty good business right now on BC disenchanting mats - I'm running BC dungeons, and DE-ing piles of gear, it's been good cash.

I'm not worried about epic flying, normal flying will be fine, if a bit painful - I already level 3 through Northrend on slowpoke gryphons, I'll do it again.

Right now my money and mats are being stockpiled for gear, gems, and enchants. When my 4 can start running instances/heroics in Northrend, I'll start saving for epic flying.