It looks like Facebook is now going to offer "vanity URLs",
choosing to include your username in the URL link to your
profile rather than the random ID numbers they have been
using so far. They say this will make it easier for others
to find you on the site.
Facebook is still at the top of the charts as far as social
networking sites go, though they have adapted themselves
over time in order to stay competitive. One example is
modifying the Facebook status functionality to resemble
Twitter's tweet system. Now this. Sites like MySpace and
Twitter have been customizing profile URLs for a long time.
In fact, Blaise DiPersia, a Facebook designer, predicts
the following: "We expect to offer even more ways to use
your Facebook username in the future."
Personally, I find the interface pretty confusing sometimes.
Maybe they can get some help in that area from Google or Apple.