Twitter's new progress bar
Twitter's been improving interactions on the new user signup process. If you're remotely interested in interaction design you'll enjoy Twitter's new (actually not sure it's so new anymore?) status indicator. It's begins at 'suggestions' - suggesting popular Twitter users; then 'friends' - the now common feature allowing Twitter to rummage through your address books in search of your friends; and finally 'anyone' - sending you to the search page.
Other than micro-copy there are a couple of noticeable features in its design:
1. horizontal layout - giving you a sense of time and with the Twitter logo at the opposite end providing the destination
2. Arrows - showing logical direction
3. Highlighting current postion using dark type and colour - suggestion of 'how far' and 'how much left'
4. Split process - left hand side all the initial connection building and right hand side (separated by a long arrow) the final fun destination.
It's a good way to guide new users through Twitter and take advantage of the network affect (having many users using/connect with it)