Actiontec introduces a two-USB and one-parallel port print server with 802.11g: They must not be certifying this particular device as they don't call it Wi-Fi. For $149 you can share with Windows computers (or Macs and Linux machines that support Windows-style printing) two printers connected via USB and one connected via a parallel port. This is a nice option for a home or office with multiple printers, and it reduces yet more cabling and complexity for managing printers on a network. It also means you can turn a computer off that might otherwise just be sharing printers.
The Achilles' heel for these types of products is the vendor's proprietary software. Often, the driver cd implies the device won't work unless you install all the crap on the cd - drivers, manuals, crippleware, etc. It's hard or impossible to tell what won't work if the printer is not directly attached. Ink-level monitoring and multifunction faxing/scanning are common culprits. One workaround is a wireless usb extender (which uses the same frequencies as 802.11, sigh).