I'm really glad that we're seeing some extra OT goodness next year with a second ESB wave. Since we know that Bespin Han isn't coming until 2010 at the soonest, this is what my list would look like (pretty much the same as everyone else):
Luke Skywalker (Hoth)
Princess Leia Organa (Hoth)
Bespin Guard (running change)
Wedge Antilles (Snowspeeder Pilot)
I also like the idea of the "other" Hoth Rebel Soldier. The rebel troops could definitely use some bolstering, and hopefully we'll see that next year (and beyond).