Out of curiosity - how can a user start out with a rep of 101 on SU? I'm looking at the profile of Merlin and even though he has no activity visible to me (no votes anyhow), he seems to have started out at rep 101. Is that due to his other accounts on SO and Apple?
If you link your accounts with a common ID like OpenID you get a bonus 100 rep, however you need to have 200 rep one site first though. This will back date as well, so if you link accounts, for example between Stack Overflow and Super user before getting 200 on either site then link with another site after getting 200 rep all your accounts will get the bonus 100 rep.