ODBC Questions

I have a few questions about the v7.1 ODBC driver:

1. What ODBC "Level" does this driver support?

2. Is there a full list of data types supported anywhere?

Also, is there a definitive list of data type mappings between MS Access and Postgres?

3. Could you supply me with some information or an example of how to use the "lo" (large object) type mentioned and defined in your FAQ. I'd like to store an LOB in Postgres and access it in say, Excel. An image would be a good example.