Thoughts on database-neutral SQL access classes for PHP?

I'm rather new to PHP, but an old hand at perl, DBI and web development. I'd like to use a database-neutral class library for my code, but I've got a couple of requirements: I like the DBAL library that's part of phpBB2, but it's license is straight GPL, and I intend to do some commercial development with this, so I need to use code with either LGPL or BSD type license. I've started using the PEAR DB class, but I'm not terribly happy with it- There are too many different (but similiarly named) ways to access the database, and their calling conventions are all different, and what's worse, I need to look at different things to find out if a database error occurred. I find myself going back to look at the documentation every time I write something that calls the SQL database, to make sure I'm coding the call directly. In contrast, I picked up the Perl DBI:: library and was using it without difficulty in about 10 minutes. Does anyone out there have a suggestion for other options? Thanks --Ross Becker