Hey millardus,
BES itself does not provide anything special with SharePoint. It just gives you access to the mobile version of SharePoint
Here is what it looks like:
WSS Demo
so the way to get to the mobile version is to just add a /m at the end of the address. The issue with this is that you don't get access to a lot of the features in sharepoint and it is view only for a lot of things.
If you would like a more dynamic and user friendly approach, I would go with a 3rd party tool. Tho my company does make one such tool.
It all depends on how you use SharePoint. If you use it to do mostly viewing of list contents then the /m approach is all you really need. If you want to do things like check in/check out then you will need a third party app like SilverDust.
~Ben