There have been a bunch of posts about base.google.com - so I figured I'd take a look, now that it's up. What is it? It's a simple online database with basic tag support. It's a bit like an extended version of flickr and del.icio.us - you can tag anything (not just photos), and you can upload the things you tag to Google's servers. It's an online, outsourced database without SQL or RDF, to be really brief about it. The real question is whether people start building applications with it.

Aha! I just stumbled on Google's take, and there's this:

Right now, there are two ways to submit data items to Google Base. Individuals and small website owners can use an interactive user interface; larger organizations and sites can use the bulk uploads option to send us content using standard XML formats. Rather than impose specific schemas and structures on the world, Google Base suggests attributes and item types based on popularity, which you can use to define and attach your own labels and attributes to each data item. Then searchers can find information more quickly and effectively by using these labels and attributes to refine their queries on the experimental version of Google Base search.

If you point your browser here, you'll find instructions on the bulk upload procedures. Looks like they support tab delimited, RSS, and Atom formats.