• HP Printer Driver 1.1 [1] from Apple "includes the latest drivers for printers you have used on your system." Unfortunately, it's unclear from that description if it merely includes drivers for new HP printers, or if drivers for existing HP printers have been improved. (Free, 405.1 MB)
• iPod touch 1.1.5 [2] from Apple applies unspecified improvements to the iPod touch, most likely security and performance fixes found in the iPod touch 2.0 software released last week. If you've decided not to spend the $9.95 to upgrade to version 2.0 - or more likely you're waiting for Apple to shake out any bugs from this first dot-zero release - the 1.1.5 update sounds like a good bet. As with other iPod touch updates, this one is available only through iTunes: connect your iPod touch, select it in the Devices list, then click the Check for Update button. (Free, 165 MB)
• Airfoil 3.2.1 [3], Nicecast 1.9.3 [4], and Audio Hijack Pro 2.8.2 [5] from Rogue Amoeba now all include the Instant Hijack 2.1 update for grabbing sound from any active application; this update fully supports 64-bit systems, the company says. Airfoil 3.2.1 has other minor bug fixes, while Nicecast 1.9.3 and Audio Hijack Pro 2.8.2 update the LAME encoder for producing MP3 files. Audio Hijack Pro also improves the MegaMix mode that Rogue Amoeba developed to record sound from Skype conversations.

[1]: http://www.apple.com/support/downloads/hpprinterdriver11.html
[2]: http://www.apple.com/ipodtouch/
[3]: http://www.rogueamoeba.com/airfoil/mac/
[4]: http://www.rogueamoeba.com/nicecast/
[5]: http://www.rogueamoeba.com/audiohijackpro/