Most -- not all -- of the twitter follows I have done have proven less than satisfactory. I think the format is just too concise. The nonprofits seem to use it too much; friends are very cryptic; the Dalai Lama doesn't tweet enough (can I say that?!).
Yoko Ono's tweets have proven a welcome exception. I am enjoying her posts enough that I followed a link to her weekly Q&A, where she answers a dozen questions posed to her via twitter through the week. Here's the link to this week's (which could serve as a regular reader, like the Tao): http://imaginepeace.com/news/archives/7703