Pay to blog feature suggestion: Track subscriptions in admin blog list

I love this plugin but I have no way (that I know of) to see who is paying and who has an expired account unless I login as them.

I would like to see in field in my blog list that tells me the next billing date for that particular blog. I'd like the text to be red if it is a past due date which means that they are locked out of their site.

How hard would it be to do this? Any chance this will be done soon?