Our district has used Intuit's Quickbase, a subscription-based online database application, for years. It has met our needs for our technology inventory, online registration for PD classes, collection of staff and student data, surveys, etc.
Here is a free Web 2.0 database tool, Zoho Creator (http://creator.zoho.com) that does virtually the same thing! There will probably wind up being a subscription version, but the creators promise there will always be a free version available.
I created a test survey, located here...it is easy! You can even easily embed the database form into another Web or blog page.