In June this year Facebook introduced username feature which lets people to easily find you and makes your Facebook profile link more sensible and easy to share and access.
Today, Facebook has brought this username feature to one step ahead by allowing users to now access to their Facebook account with their username instead of email address.

So now you can use your Facebook username to sign in to your Facebook account even you can use your username on Facebook Connect enabled sites.
If you still haven’t picked a username for your Facebook account then do this right now.
