I attended an excellent session by Oracle SOA Suite customer Rajesh Gathwala from Agilent.  He said most mobile vendors have their own embedded toolsets but the problem arises when you have too many of these disparate toolsets in the organization..."How many toolsets do you want?".  He highlighted his solution which standardizes on Oracle SOA Suite for integration including mobile.  Here is a screenshot describing how the integration includes Oracle eBusiness Suite, Oracle Service Bus and the security solution from his presentation:

You can see a video of Rajesh speaking about Agilent's Oracle SOA Suite implementation from last years OpenWorld (prior to his mobile integration).