From time to time, we've all been tweeting podcampct promotional info. One thing I've found is that it's important to address the message using @s so you can be sure the people see the tweet and it doesn't just get washed downstream in their general feed. Also, if you put the @s first in the message, be sure to preface the text with a . to make sure it's generally visible and not restricted to just the people who follow the first @'d person on the list.
I just tweeted a bunch to my list of CT followers that looked like this: ".@AdamsLisa @Jennifer_Fish @MiyasSushi @criana @MyCaricature @ShelleyCHolmes @RachelFerrucci PodCampCT is May 12!
http://podcampct.org"
JoeC