Yes, there already is an Ipod touch 4th generation you can buy it at apple or bestbuy.
yes
no because the ipod touch 4 is a newer version
no.
No.
there are 4 generations of the ipod touch
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.
Yes
you get cydia by going to cydia download ipod touch thanks ]
It is already out.
An 8GB ipod touch 4g costs about $200. An 32 GB ipod touch costs $300. An 64 GB iPod touch 4g costs about $400.
Yes, you can "Undo" a Jailbreak, by going into iTunes and Restoring your iPod Touch, or iPhone.
2cd generation 64gb ipod touch for 400 dollars