You may not yet have heard of FON but this self-proclaimed "largest WiFi community in the world" is likely to gain huge visibility (and generate a lot of opposition from some ISPs) with its tempting proposition to share your broadband connection wirelessly and either gain free wireless internet connection worldwide or payment for doing so.
Would-be sharers (FONeros in FON-speak) who don't already have a broadband wireless router suitable for accepting FON's dedicated firmware can still join in and at virtually no cost - FON is offering routers at a knock-down subsidised price of just €5 or US$5 (excluding shipping and VAT).