Subscription Management

Hi All,

I want to implement subscription management something like tatasky or so.

I studied
http://www.amicontech.com/blog/subscriptions-in-ofbiz-and-opentaps/
and found it is there in webtools. Also as per blog there is no
implementation in E-Commerce demo site.

I am using trunk version taken checkout last week.

Please let me know if it is still not implemented in E-Commerce demo site
in trunk version?

Also, please any more reference URL which can give more step by step
implementation.

Thanks,
Krishan