You cannot upgrade the RAM on your iPod Touch. The RAM on your iPod Touch is permanent, and if you want it faster, you must buy the newest generation of the iPod Touch.
Any generation of the iPod touch can upgrade to the latest firmware (the first generation iPod touch cannot be upgraded to the latest firmware, but it can be upgraded to 3.0 which does support apps) The first generation that supported apps without an upgrade was the second generation.
Upgrade to iOS 4. It's free. It won't work if you have an old iPod Touch (before September 2009) or any 8GB iPod Touch. You'll need to jailbreak to get wallpaper.
No, you cannot. The iPod Touch games can only be played on an iPod Touch.
You cannot get a camera on any iPod touch except for the fourth generation iPod touch.
You can jaibreak any iPod touch with Blackra1n
No, you do not need an AT&T service for the iPod Touch. The iPod Touch is like any other iPod, and does not need a phone service.
Yes, the iPod Touch of the same capacity as any other iPod will cost more.
You get an ipod touch from the apple store.But you can also get it from target or any other store.
You can get any and all apps in the app store on your ipod touch.
You can jaibreak any iPod touch with Blackra1n
on an ipod touch or an iphone yes, but not on any other ipod
No, there is not a 4 gigabyte iPod Touch. The iPod Shuffle comes in a 4 gigabyte capacity, and is the only iPod that does have that capacity.