Boosting on the alliance side is going really well so far - for anyone who hasn't done it before (like me), I started on Monday and as of the end of the day Friday I'm at:

4 x DK @ level 65
4 x Shaman @ level 63
4 x Mage @ level 60
4 x Pally @ level 30

I'm leveling all 5 together until level 10, then using my geared 85 to boost the other 4 accounts in dungeons (so far, Deadmines to Stocks to Cathedral to Scholo to Upper Spire to Ramps), so I'll have to use the RAF grants or other boosting to catch up the initial account that has toons stuck at level 10.

Moorea - great suggestion on leveling some horde toons. I don't have a toon to boost, for I do have several on other realms I could pay to xfer and quickly get a team together. My fingers haven't fallen off yet!