Patch

I've written quite a few patches for Drupal in the last few months, but most of them were either bugfixes or ideas/patches/tasks of others I've taken further.

Recently, I proposed the first patch, that was my own idea : http://drupal.org/node/450666.

DBTNG does have the nice concept of Extenders, which are essentially a standardized Decorator pattern. You can use them to provider additional functionality to the SelectQuery class, which can build a SELECT Query with a OOP-QueryBuilder.