How much, if any, would push-ups done in hand stand position help in muscle development? It would seem better than regular push-ups because of the fact that now you are actually pushing your entire body weight, but I wasn't sure if it would help or just stick with normal push-ups.

And can anyone help me with getting the correct form, I would love to do a lot of gymnastic stuff (flips, hand stand, even a normal cartwheel) I just don't have time to take a class.

Thanks~!

i dont think you should do it instead normal pushups, as i think handstand push ups (assuming that is what you are talking about) wont target the chest as much, atleast i dont think so, its like bench and military press.
handstands you press over your head, while push ups you press out infront of your chest, so its a different movement.

handstand pushups i guess would use mostly shoulders and triceps, and probobly alot of stabalizers in order to keep the body straight

Karky nailed it, do them in conjunction with push ups.