Abstract Database Interface

[BLM768]

> I am working on similar project, named SQLd[1]. If you are 
> interested, we can join forces and work togheder :)
>
> IRC Nick: Robik
> [1]: http://github.com/robik/SQLd

That might be a good idea. I haven't done much for supporting 
different databases, so getting more backend support would be 
quite nice. What might work well is for me to just refactor my 
code to sit on top of your existing database classes. So far, 
I've really just been playing around, but if people show enough 
interest, I'd like to play with the idea a while longer. :)