I've just discovered posterous (thanks tuttle club) so I'm trying it out.

I think it might help me with those emails that are "half private half public". I mean the ones  where I start to write the email then realise that I need to add a chunk of background information that is not yet on my blog.

What to do? I can write the background on the blog and then do the email - but that delays the email. I can write the email and just cover minimal background - but even that takes time, and the info isn't easily to hand later for sharing with others. 

Maybe posterous will work for me. Maybe I can write to posterous and then send a blind copy (or similar personal version) to the person who needed the see the info in the first place.  I'll give it a try and find out.