Ian, SQLObject is looking really good, especially after these last few releases. I should really get moving and publish my DB-API abstraction interface and data mapping layers. Some parts are actually very similar to how SQLObject does things.
i.e., I have a set of abstract data types in Python that allow Python expressions to be translated into SQL like SQLObject does. However, I use typed SQL objects, so that they can offer richer interface. For example, SQLDate objects have properties that result in expressions to access month, day, year, start-of-month, start-of-year, etc. String objects allow subscripts, slicing, searching, etc.
So there seems to be many places where our projects would benefit from collaboration.