Don't track "non-public" blogs

[trent]

With WPMU it gives you the option to not have blogs indexed by search engines.

Right now, activity from blogs marked as public = "0" for not searchable are also being tracked by siteside and member activity. It makes sense to only pull blogs that have public ="1" for instance. Pulling blogs that have public ="0" are blogs that don't want to be indexed by search engines and will in fact be indexed through the profile pages as well as their posts.

I guess it comes into another option of making sure the following are part of the equation as well:

mature = "0", archived ="0", spam ="0" and deleted ="0"