Just to bring everyone up to speed....
I've removed the defautl site from my App_Data folder. Hit the URL, copied my connection string and known properties over (kept same site name, table prefix, etc) and hit run. I can now enable the migrate14 module.
I migrated all of my items over with little issue. The only thing that didn't seem to migrate well were my blog posts. However, I wonder if that's because I'm using bertrandleroy's Vandelay.Industries module. I did get an exception on that so I'm going to
see if upgrading that fixes this issue.
Finally, I had to rechoose the theme.
So, my only outstanding issue right now seems to be my blog posts. I'm working to resolve those issues though.