Hi Ollie,
Do you mean posts by the group members to their own blogs, or to the group blog?
I’m working on an email subscription system which will be ready soon.
In the meantime though, you can use RSS feeds, which may be a better solution. Have you used Google Reader or another blog reader? Sign up to Google Reader. Then you can subscribe to the blogs you’re interested in by RSS, and any updates to the blogs you’re subscribed to will appear in your Google Reader page. So you could have a folder in Google Reader devoted to your myblog.arts subscriptions.
To subscribe to a blog, click on the RSS icon in the browser address bar. (Square with ‘radio waves’ in the corner.) You’ll be asked to choose what service you want to use to subscribe with. Choose Google Reader, or another blog reader you have an account with. Or, in Google Reader, just add the URL of the blog you want to subscribe to.
Hope that makes sense – if not give me a call. I realise that this is an important feature so I will post updates as they happen.
Best wishes,
Mike