Is a 10 gallon big enough for two neon tetras, two guppies, and two African dwarf frogs? I have another ten gallon with one goldfish in it but I don't think any of them would be comfy with him..or he with them.
Sounds a little packed to me. Depending on how much waste they produce (doesn't sound like much), it will probably be ok but watch those Ammonia levels.
yeah there is always a chance that the females will already be pregnant when you get them if they're in a tank mixed with males. but most lfs's keep them seperate.
Well, as long as you don't add them all at the same time (to allow the biofilter to catch up) and you have really good mechanical filtration, all should be well. In fact, you can have even more if you really want...but I wouldn't recommend it.
I don't see how 2 guppies, 2 neons, and 2 dwarf frogs is even close to the "limit" on a 10g... those are all small fish with minimum bioload. Even with 5 neons that tank would be slightly understocked.