Yes, we have a beta site. After seeing the thread about starting a planet up in the PA fourms, I decided to try my hand at one myself.
So point your browser over to Planet Ubuntu Maryland and give me some constructive feedback. Currently my and Jono's blogs are on there and once I get done tweaking Jono's will be gone.
Also check out the wiki page for guidelines on getting your blog added to the aggregation. Read over the page and let me know your thoughts.