1.With Spelunky,does his blast jump thing activate by either pressing the special button or jumping twice?
It Activates the second time you press the jump button. If you press Jump during the vertical fly you will do a fast fall.
2.When you get Teh Internets,do you have to beat 1 chapter to get the rest?
When you get to Teh Internets you will have all the current Internet maps.
3.The Warp Zones are all the same,right?

Yep!
4.Do you HAVE to A+ all stages for Meat Ninja?If so it'll take me a year

Nope, just 100%(all maps completed+bandages+warps)
5.Are those charater specfic stages coming to XBLA too?Like the commander,kid,etc?

The character specific stages came to the PC ;)
6.What if a chapter chosen by Team Meat has a PC only Charater in it?Will it be PC only?
You can't make levels on the XBLA version...but no PC-only-character-maps will be released to XBLA.
7.Gish plays the same as Gooball,am I correct?(Headcrab jumps more accuretly)
I haven't used Goo ball so i dunno :O
8.Cotton Alley is the same,right?

Yeah!! :D