The basis is a JavaScript widget that users can paste into any web page that allows them to post that page directly to twitter with a tinyURL already in place. The benefit of a JavaScript widget is that it can be made into a Greasemonkey script for any site, so the site itself doesn’t need to implement it for users to be able to take advantage of it.

The example shows it on Flickr.

The tinyURL is automatically included into the 140 character limit and there is a counter to show how many characters are left.

There needs to be some thought on whether the user should have access to the link information or if it should be a non-editbale function.

The user will obviously need to sign into their Twitter account but the Twitter API allows this fairly easily. How and where the user does that needs more investigation.