It’s a piece of cake to setup; simply visit tweetbars, insert your username and a second later you’re presented with three different embedding options; BBcode (for forums, Html and a straight URL.
Unfortunately the major downfall is that embedding into gmail isn’t an option as gmail doesn’t accept html, unless of course you’re willing to:
- Use a bookmarklet to insert html signatures
- Install blank canvas gmail extension or better gmail
- Install wisestamp firefox extension