Had reinstall OS X Snow Leopard on IMac today. ITunes not recognized iPad

Have you applied all the Snow Leopard software updates?

Hi there,
I was searching for Ipad related news and google just gave me a live result about your post.
Its my first ever reply to somebody on this discussion forum...
In your case, Try following things.

* Make sure ur OS is upto date.
* make sure you are using the original iPad cable and connecting it directly to the mac/pc WITHOUT using any kind of Usb Hub etc.
* Connect something else to your usb port to check if USB port is functioning OK.

1- SMC / PRAM reset.
2- Create New User account and check if itunes recognizes ipad in new user.
3- If YES, then it means its a user specific issue and its only occuring in your account.(try pulling itunes.plist file from user/lib/preferences. After moving that particular file to desktop, log out and then log back in and see if that fixes the issue.
4- If YES, then it means you were having an issue with the plist file.
5- If No, then may be you can try running repair disk permissions.

- Best of luck.

Have you tried here:
http://support.apple.com/kb/TS3540
(Mac OS X v10.6 or later: iOS device not recognized in iTunes after restart)