[throwaway5752]

I don't want to go there to read peoples' blogs, though. Some sort of limit on content length feels like it is key to what defines Twitter (whether 140 char or something else).

[noelwelsh]

This can easily solved at the UI level. Posts longer than a certain limit can have only the first few lines shown, with a "fold" like on blogs, or some other mechanism, to reveal the full content.

There won't be many long posts in any case.

[lhnz]

That's exactly what people achieve with screenshots of text below their tweets.