Alessandro announced on SpatiaLite group today that QGIS 1.1 will include a data provider for SpatiaLite, the spatial extender for SQLite.
It’s out there now in the SVN trunk if you’re so inclined. I am curious how long it will take to cascade through to the OSGEO4W build.
If you haven’t check out SpatiaLite, I highly encourage you to do so. It is powerful and very lightweight.