How to manage multiple wordpress blogs?

I have around 56 old autoblogs and most of theme have PR2 but I am not automating them anymore. I use these blogs as my own article directories for promotion of my main sites.

Is there any software (free or paid) or program that could be used to post a single article to all of these blogs in just few clicks?

I tried w.blogger but it seems the "post to many" option is not working for there is only one blog on the list... it's not loading my entire lists..

Any suggestion is highly appreciated...