Ask about BizTalk Server

These are very broad questions. You'd do well to read the documentation provided by Microsoft on MSDN, but I'll give you the quick overview:

BizTalk Server is a product that attempts to make it easy for an enterprise to create rules for how data/documents/etc. should move through a business process. For example, you could use BizTalk to design a process for how an invoice is created and draw all the steps, taking data from the inventory/fullfillment stage and then into accounting and etc. The big pain point that it solves is making data from different applications and even different enterprises talk to each other. The metaphor that is often used is that of language: BizTalk is a lingua franca wherein "French" documents and "German" documents (not literally but imagine French as PeopleSoft and German as SAP) communicate in a third, neutral language. And, not suprisingly, that language is XML.

Yes BizTalk is connected to B2B in ways that should be obvious based on the examples above. If you're doing serious B2B you're probably already creating lots of custom tweaks to try to get different vendor's systems to talk to one another.

As for SAS, I looked at the adapter lists--both Microsoft's and the third party list--and did not see any available adapters for SAS. You can see the available adapters here: http://www.microsoft.com/biztalk/evaluation/adapter/default.mspx

Lori