Hi Deepak,
Open any of the presentation / recording you will find the list of all features in Slide 7 of the deck. For every feature we either have conducted a detailed functional webinar or will be conducting one as per schedule in http://exchange.ariba.com/thread/3246. You can get the recordings of the completed webinars at the link mentioned before. For others I encourage you to attend the webinars. Let me know if you need any further information.
regards,
Hari Babu