tweet cat a to twitter account a, tweet cat b to twitter account b ???

Hi all,

Is it possible to setup wordpress so that each category auto tweets to a twitter account just for that category? Tweeting all articles on the site to one twitter feed will be way too noisy for people to follow.

Category A ——-> Twitter account A
Category B ——-> Twitter account B
Category C ——-> Twitter account C
Category D ——-> Twitter account D
Category E ——-> Twitter account E

From my initial investigations it doesn’t look like this is against the Twitter T&C.

If it is not possible then I may have to break the domain up – and have each category as its own wordpress installation. That would be horrendous amount of work and I am guessing would not be good for SEO. So, second question; does anyone know how nested wordpress installs rank in the SERPs?

many thanks in advance ??