By the time iPhone received the new firmware 2.2, iPod Touch also have that. But the firmware update is different, and some new features for iPhone cannot be found on iPod Touch firmware 2.2. Google Street View is one of them.
Since iPhone and iPod Touch share the same OS architecture, it may be possible to enable it by editing the system files. You will need to jailbreak the iPod Touch to do so. Since jailbreak iPod Touch 2nd generation is not possible, this only applies to the old iPod Touch. Detailed instructions available here. It involves converting some files to xml for editing. Backup before you proceed. And as always, try it at your own risk.
1. get this file via ssh: /System/Library/CoreServices/SpringBoard.app/N45AP.plist
2. convert to xml at http://iappcat.com/plist/bin2xml
3. add<key>telephony</key>
<dict>
<key>maximumGeneration</key>
<real>2.5</real>
</dict>underneath
<key>standAloneContacts</key>
<true/>4. save then using that website again reconvert to binary
5. rename original file N45AP.old
6. copy new N45AP.plist in (make sure permissions are 644)
7. reboot ipod
[via iPod touch Fans Forum]
