I finally replaced the cheezy keyboard and mouse that came with my G4. No more noisy, sticky keys and no more puck! YAY! I got a Microsoft Office Keyboard and a Microsoft Optical Trackball. These products were made for PC, and only come with PC software CDs, but you download the drivers and software for Mac off of the Microsoft site. The difference in features and performance is like night and day. After shopping around for overpriced, "made for Mac" products, I stumbled on a site that suggested these two products, and I couldn't be happier with them. I got a great deal on them through Micro X-press. Their price was $31 for the keyboard, $34 for the trackball, and $12.94 for shipping. If anyone is looking for replacements for their cheezy Mac input devices, I highly recommend these.