Hi Mike,
I'm afraid I wasn't able to turn up an SAP-specific LabVIEW guides. I did, however, take a look at some SAP information online and saw that it has an ODBC driver and supports SQL. So, I think that your interaction with it will be very similar to your interaction with MSAccess.
I think that you will set up the database in the ODBC Data Source Adminstrator (Control Panel>>Administrative Tools) and use the Database location to open the connection in LabVIEW. I don't know the specifics of its SQL support but this document (which you may have already) looked very helpful:
http://www.sapdb.org/pdf/usmanodbc_eng.pdf.
Perhaps one of our forums regulars uses SAP themselves?
Good luck and let me know if you have further questions,
Megan B.
National Instruments