can anyone recomend a blog network

I would make my own if I was you and get something like AutoBlog Samurai to manage the blog posts. That's what I do and it is great. I haven't found many big blog networks to be very effective after Panda, unless they actually check the content before it is posted.

If anyone can recommend a good public or private blog network please PM me!

The 2 biggest problem with networks, public or private, is the use of too much unnatural exact match anchor text and people giving up information in response to unnatural link warnings. The only way to counter this is to have a lot of IP diversity, restrict the anchor text that you allow on your network, and restrict the number of blogs that any single member can post on.

well i have some pr sites.. let me know if anyone interested..

I would to answer your questions..

The thing is, if the blog network is open, then google will join and deindex all the link.

The best one are invite only and you need to have connection.