I don't think anyone would read my blog if it were the same content as my twitter. An endless stream of 140-character tidbits is different, to readers, than 140-word rants about the same things.

There are many times when I want to write more than 140 characters about something... but if I did that, nobody would read them.

(Twitter used to let you submit the form with more than 140 characters... now it rejects those posts server-side. Fucking Twitter...)