Add a "Site Category" field to site info

Was thinking about how to improve Project Browser, and thought it would be nice to have a "recommended downloads" panel. But how would PB know what to suggest? Let's allow a user to store info about the site at admin/config/system/site-information. Maybe a main field for "Club site" or "church site" or "NGO" etc, then a tag field for subcategories. If we add that field to the installer, we could even have recommendations for downloads show up right away on the front page, instead of the add content text.