HP Printer Drivers v.2.5.2
Apple has released revised printer drivers for Hewlett-Packard printers. The driver package provides support for hundreds of HP printer models and requires Mac OS X 10.6.1 or later. The update is available via Software Update as well as directly from Apple. A complete list of supported printers is available in an updated knowledge base article. (Free, 448.7 MB)
This is a massive download. Is there anyway to delete some of this stuff, as I can't imagine using all of these HP printers (I have one)?
Printer drivers are stored at /Library/Printers, and you can go in there an delete unnecessary stuff. However, when I looked at my hp folder (their capitalization, not mine), it looked like it might be fairly difficult to discern what could be deleted and what would have to stay. I'd recommend proceeding with caution, so you can replace files that might turn out to be necessary.