3 platy
2 honey gouramy
5 glowlight danio
3 threadfin rainbows
2 dwarf chain loach

or for an african tank:
6 cardinal tetra
5 midget sucker catfish
2 apistogramma
6 dwarf pencilfish
6 corydoras similis
also look out for:
lemon tetra
rummynose tetra
black neon tetra
marble hatchetfish
cherry barb
danios
wood catfish
steel blue killifish
guppy
neolamprologus brevis
forktial blue eye
pygmy pufferfish
hillstream loach gastromyzon punctulatus
oh, and its good to have 2 polka dots in a 3 foot, too, he says