Working on the assumption that there is a fair amount of Linux / OSS users on the list.. Support for WiFi hardware has long been a thorn in the side of Linux users - what product to buy, which chipset will it have, will it actually arrive with the correct rev of the correct chipset, will the latest kernel support it, etc etc. But I've come across a line of product which works so well I have to put it out there.. It's the stuff based on the RALINK RT-5370 chipset. So far all I have are USB-based adapters, but they are 100% plug-n-play under recent Ubuntu OSes and seem utterly bulletproof. Fast, too! I have tried both the tiny white 'chicklet' adapter as well as the more conventional type with an external antenna, and both types perform beautifully. They can be had for as little as $3.65 +shipped+ from China, or around $8.95 from US sellers. I now own three. Literally stunned at how well they work - plug it in, type in your network pw and go. As I understand it, the chipset mfr. opened the specs for the Arduino developers, and the adapters are targeted at Arduino users - at least that's how they're advertised on eBay. But they sure work fine in my commodity PC hardware.. What a pleasure!