What's your favorite DB abstraction library? I don't currently use one, but plan on checking out adodb pretty soon.
I use a self-created one...
Seeing as how there's only one true database, and its name is PostgreSQL, I'm not sure what this thing you call an abstraction layer is. :-)
When I do use one I tend to use ADODB.
Heh, one database to rule them all, eh? ;P
I heard that creole (php 5 only) is very good, and was developed to handle some things left out by adodb
http://freshmeat.net/projects/creole/
it's based on jdbc