Sys: web form, c# using .net 3.5
User Action:
1. visit my site
2. click on login prompt
3. enter twitter details AT THE TWITTER SITE
4. return to my site
5. enter comments
6. comments updated onto my site and optionally twitter using the twittername as a tag.
comment handling not required at all. Code must handle login using twitter site and return user to my site for further processing.