Really glad to see someone else thinking of Twitter as a social network rather than a marketing platform.
Copywriting.com: Copywriting for Twitter
Twitter has a strict limit of just 140 characters and that requires you to be concise… there’s no room for fluff or hype! So the real question should be: How do you use copywriting in a way that works for microblogs?
Learning to write in a sort of web-shorthand can be a challenge for those of us born to be verbose. Cramming all of my thoughts on a subject sometimes requires multiple postings, chunks of a virtual conversation, so to speak. But this type of writing can lend itself to opening up yourself to allow others a glimpse at your personality, which is ultimately what they will follow. This type of writing obviously can be very informal, but the goal here is to get across your ideas in a few words as possible, and spark reciprocal conversation.
Use Twitter to announce what you’re doing, share your trials and tribulations, seek answers or just about anything else you can imagine. The one thing you DON’T want to do is try and sell anything off Twitter. Work around it; the sales will come, when you’ve put in the time to build relationships.