Halflings and Gnomes eh?
For the Fighter-Rogue, I demand the Halfling Slinger, a master of ranged combat with the most simple of stones!
Gnomes eh? Illusionist-Bard = Rocksinger?
I can see the halfling book masterwork items.... Masterwork Spoons and Forks! Masterwork cheese!
That leaves half-elves and humans... perhaps the summer project?
Any idea on what's next after the Heroes of High Favor is done?
One of the things that'd be interesting to see is Classes of High Favor, where you take each class and show the prestige class each race has just for the core class since the HoHF show the race side with dual-classing.