You can use RSS Graffiti to publish tweets to Facebook.
In order to retrieve tweets from tweeter, RSSGraffiti needs you to connect your twitter account(s) (...and of course to provide a twitter feed)
This is required because twitter has a limitation on the number of requests allowed per user. Thus it is impossible for RSSGraffiti to fetch the feeds of all its users as this limit is just not adequate.
Furthermore, using your twitter account, you can use any restricted twitter RSS Feeds that only your account has access to.
You need to add at least one twitter account at your User account settings to be able to add your twitter feed in any of your walls.
Connecting your account is done using twitter oAuth. We are NOT asking you to give us your twitter password, only to authorize us to use it to retrieve your feeds.
RSSGraffiti uses the account that is configured for each feed to retrieve it from twitter, and using your configuration settings publishes it on your wall.
Twitter accounts are added per user account. You can add multiple twitter accounts. Twitter accounts can be used for any Profile, Fan Page or Group a user administers, and for any of the twitter feeds added to these walls.
RSSGraffiti uses a cascading logic to determine which account to use for each feed.
First it checks if a twitter account is specified for the specific feed and uses it.
If nothing is configured it checks to see if a twitter account is selected for the Fan Page / Profile / Group and uses it.
If nothing is found it looks if any accounts are added (by any of the users administering the specified wall) and uses the first available.
If nothing is found it tries to use its own generic account without guaranteed results (due to the requests limitation aforementioned)
This is done in simple steps:
Add your twitter RSS feed on the desired wall. Just use this link and replace username with your actual Twitter username: http://search.twitter.com/search.atom?from=username or http://api.twitter.com/1/statuses/user_timeline.rss?screen_name=username (note: currently this link is truncating re-tweets)