I've had several postings about taxonomy for Sharepoint 2010 but I wanted to make sure I've provided a link to the list of foundation taxonomies available from WAND.
Taxonomies for Sharepoint 2010
These taxonomies are designed to get you started in implementing your own taxonomy. Once you've selected a foundation taxonomy, it can be customized to include the specific terminology for your organization. You can customize them yourself or WAND professional services can assist.