I just wanted to post my recent experiences trying to get a Wireless G (802.11G) solution for my Powermac 450mhz AGP running Tiger 10.4.2.
First off, after some trial & error, and tons of researching, i found out that there are VERY few options for getting a PCI wireless G card to work on a mac. This means that you CANNOT simply walk into your favorite computer store and get a "trusted brand" such as Linksys, Dlink or the like. In order to get native OS X wireless G networking, you need a card that utilizes the same BroadCom radio chipset that the Apple Airport Extreme card uses.
Unfortunately most companies no longer use this chipset, save for a few. For example, Sonnet makes a wireless G card but is unfortunately $100+
Then i came across this informative website:
and after some searching, found that TigerDirect.ca carries the Buffalo WLI2-PCI-G54 for $53.99.
i ordered one (they dont have any at their retail store, so youll need to buy it online) plugged it into my mac and now am enjoying wireless G, 54mbps on my powermac AGP!!! Apple profiler recognizes the card as an Airport Extreme.
anyways, i hope this posting is informative/helpful to those who are looking for an inexpensive method for wireless G on pre-Airport Extreme desktop machines.