Update: You can also look into ipad 2 specifications for latest features introduced by Apple.
Some of the screenshots and conclusion taken from iPads are as follows:
Composing a mail in Gmail for iPads
Cons: I miss the attachment option in the Gmail for iPads, i need to send the files from external applications and default options available on “Photos”.
Forwarding mails in Gmail for iPads
Online Twitpic website for iPads
Cons: On online site of twitpic the options of uploading file (choose file) is missing and all the applications available on Apple store are paid.
You should also look intoipad 2 specifications for more details about latest apple’s devil.