Well here's a patch against trunk that should autoload referenced tables as well. It's only lightly tested, and I'm out of town for a few days, so I didn't want to commit it just yet. Give it a try if you'd like. Note that the metadata.reflect() line in Mike's test script won't work in case-sensitive databases in mssql, as it issues the fetch queries in lowercase.

I'm going to pass on the reflection speed-up patch. It handles column loads only, ignored case-sensitivity issues, and the FK check hits the information schema views anyway, so I really doubt we'd see much of a boost.