I just did a post on about choosing a Twitter name. I’ve posted an excerpt of this entry below.

Choosing your username is very important depending on what you plan on doing in the twitterspehere. Individuals who frequent social networks and have many logins or have built up their own brand on Twitter, will go with a name that they use on every other network. I use AdamJackson on every network as the default username. Other users have aliases that they use everywhere. Where things get complicated is when you are going to use Twitter for business and then choosing a name becomes a little challenging.

You can read the full post here.