Wisdump’s Thord Daniel Hedengren has an insightful post on using sub-networks within a blog network, a tactic employed by BNW’s mother outfit Splashpress Media.

To quote Thord:

The benefits with sub-networks within a blog network are:

• More visible network linking to relevant sites, while still having the opportunity to do traditional blogroll-style links to the rest of the network.
• Borrowing reliability strength across the sub-network. A young and promising blog will have it easier if the first time reader sees one of his old favorites being closely networked with it.
• Branding the sub-networks helps when releasing new blogs into the network, it will immediately borrow from the sub-network’s established brand, and therefor seem more complete than it actually is.
• Better traffic opportunities between sub-networked sites (compared to a massive links list).

That’s as succinct as you can get. Head over to Wisdump for the whole post.