Can I get information on what are the chnages with current Ariba SIPM and contract module as compared to old version.

Hello Team,

We are planning to go for Ariba implementation but want to know on current version of SIPM, Contract and P2P module in Ariba. Also want to know where I can get information on Ariba to ECC interfaces. To integrate with ECC we have to use PI as middleware or direct integration ?