About Twitter - tweets and retweets do two different things (both good). A tweet to cryptsy will be seen by them, and everyone that follows them. A retweet will be seen by people that follow you.
There are a lot of other effective ways to use twitter, let me know if anyone wants more info.
Ok well I've been wondering about this to decide which approach to take. So in that case, if you do have any further useful information to give I'd be happy to receive it.
Thanks