WRT54G + DWL-G650: ok choices for Linux 802.11g support?

Hi,
I need to get up and running on wireless in about ten days
in time for a demo, and I'd like to use 802.11g rather than
the older, slower 802.11b. Several hours of googling on,
here's a shopping list for stuff that ought to work with Linux
that doesn't require closed-source drivers:

1. Access point. I'd like one I can run Linux on directly
if possible, simply for cool hack value.
http://www.batbox.org/wrt54g-linux.html describes how to do
this via a security hole in the Linksys WRT54G, which
sells for $105 according to PriceWatch, and $110 according to Amazon
(http://www.amazon.com/exec/obidos/ASIN/B00007KDVI/).
Yes, I do worry that using a box with a security hole is a bad
idea, but I'll probably flash it with the new, fixed firmware
after I'm done having fun.

2. PCMCIA card. I'd like one with open-source drivers.
The D-Link DWL-G650 (http://www.dlink.com/products/?pid=11)
does seem to have open source Linux drivers for both its
A variant (http://ruslug.rutgers.edu/~mcgrof/80...rted_cards.php)
and its B variant (http://sourceforge.net/mailarchive/f...orum_id=33958).
It's $50 at Amazon (http://www.amazon.com/exec/obidos/ASIN/B00007LTB6).

Somebody very smart suggested trying Knoppix to make sure it could
recognize and support hardware before buying. I don't think I have
that luxury here, since 802.11g drivers are awful new.

So, the question is -
are those good units that will interoperate well with each other
and with legacy 802.11b hardware?

And where's a good place to buy 'em? I'm tempted to go with Amazon,
but if there's a store in Los Angeles with them in stock, and prices
not too far off from Amazon's, I'd be happy to buy local...

Thanks,
Dan