Hi Daniel
I will not be very helpful I am afraid in answering your question as I am not using Twitter and as it is mainly the creative process I love about art so I would not be interested in promoting myself but i can see that Twitter would have tremendous advantages for famous artists like yourself or new artists wanting to establish themselves especially adding the links as you have done. I think by this discussion you will persuade a lot of artists to sign up to it to promote their art, by adding their events, links to galleries, exhibitions etc.!
Pauline
I just set up a twitter link. I post whenever I'm featured in an etsy treasury, also I have it linked up to my facebook fan page so every time I post something new, it automatically posts in twitter as well.. it's mostly other etsy sellers on there following me than buyers though, so not sure if it helps at all..