http://www.flamingspork.com/blog/?p=338 lists a way to build the driver.
(that's rt2500 which possibly isn't the same thing, and I found it quite hard to follow)
http://lists.ubuntu.com/archives/ubuntu-users/2004-October/008665.html implies it should be in Hoary anyway!
(But it doesn't appear to be)
Get the sources and unpack them somewhere appropriate (I'll assume /usr/src/)
Then, as root;
apt-get -y install gcc linux-headers-`uname -r` cd /usr/src/rt2400-1.2.1/Module make && make install echo "alias ra0 rt2400" >> /etc/modules.conf
After this you should be able to set up ra0 under /etc/network/interfaces, the same procedure as any other WiFi? card.
There's also some Utilities included; they require c++ (apt-get install g++) and qt-x11, and I'm having trouble getting them to build but they're not required to get the card working.
No page links to 0101.