Is it possible through a plugin or just a setting I haven't

Is it possible through a plugin or just a setting I haven't seen that allows users on a MS network to 'follow' blogs on the network?

Kind of like you can do on blogger so you can see your followed blogs latest activity in a page in your account.

Or at the very least, following a blog on the network adds that blog to the users 'My Sites' drop down to make it easier for them to access them.

Thanks in advance!
Gavin