You will still need to connect it to a computer's iTunes in order to reset it - and you may need to put the iPad into recovery mode : http://support.apple.com/kb/ht1808
If if hasn't been synced to a computer then (from here) :
If you restore on a different computer that was never synced with the device, you will be able to unlock the device for use and remove the passcode, but your data will not be present.
Have you been backing up the iPad to the cloud ?
You should be able to re-download apps and ibooks, and (depending upon what country that you are in) potentially music, films and tv shows.