Making my bi-weekly scan through CssMania, I spotted DabbleDB. At first, I thought they were just another webified ASP version of Microsoft Access (there are a bunch of them these days, along with some simpler open source projects that attempt to do the same.) They are kind of like Access, but with a lot smarter and easier for joe public to use.
Be sure to check out their 7 minute demo video, you’ll be impressed. They upload a CSV file and automagically create a database structure from it. Then they do a bunch of database schema changes like changing field types and normalization never having to get into any gory details. Doing this kind of stuff for a living, I’m very impressed how well they’ve put things together. Good job!