no it doesn't. i have an itouch 4g and it doesn't have soundhound. hope that helps :)
No, you can sell your iTouch 2G and purchuse a newer iTouch
No.
Fine. The iTouch 4G has things that the 3DS doesn't have and the 3DS has things that the iTouch 4G doesn't have. The iTouch 4G has a good amount of battery and the 3DS doesn't (so if traveling, 3DS bad). The 3DS is 3D and it has a few cool programs but then the iTouch 4G has more cool programs and the 3DS just has the 3D effect, which is cool, but not brilliant. To get all stuff for the 3DS costs a lot of money (console, case, screen protecters, games). The iTouch 4G is less money (console, case, screen protecters.), and you can get some good free games and since you sold your 3DS (and probably the games and equiptment, too), you will have money to buy lots of great games on your new iTouch 4G (and the iTouch 4G games are way cheaper than the 3DS games)! The 3DS can make your head hurt and can cause eye-straining in a short amount of time (and the iTouch 4G probably could, but it would take way longer). There are also very little good 3DS games (the 3DS can play DS games, but they are blurry on the 3DS), but there are a lot of good iTouch games/programs (the the 3DS can download games/programs as well, but there are way less good free games/programs. All the great games are expensive.)
the 8th
yes it is you can use redsnow to do it
it is coming out September 8 and you can order it of best buy right know
You can use Skype and other VoIP (Voice-Over-IP) applications.
mmm the ipod touch 4g already come with iOS 4
no but that would be cool
Support higher resolution apps, work with faster graphics and possibly connect with 3G or 4G LTE.
If u don't have wifi u might have a restriction for it if not something else is wrong