Do you mean jailbreak it? You have to do this to be able to do these things. To jailbreak your phone go here.
Download iLiberty+ 1.51 for Mac - iLiberty+ - A software application that helps you jailbreak, activate and unlock your iPhone - Softpedia and dowload iLiberty, and jail break your phone. after you've done that.....
Wish1: I'm not really sure about this one, there's an app, but i forget what its called. I know it's possible though.
Wish2: Go to installer, and install Fring, after you install it, open fring up, go to the communities part, tap skype and enter in your skype details.
Wish3: Use Fring for this too! Just go to the communities section and enter in your AIM details, then tap subscribe.
Wish4: Don't know about this one, I'll get back to you on it.
Wish5: Yes, there is a NES emulator for the iPhone, it's in installer, it's called, uh, NES, go to installer and search for it.
Wish6: Just go to installer and install Navizon.
just make sure to refresh your sources often and update your apps.
any questions?