This is an old revision of the document!
The rtl8187 driver is a FOSS mac80211 driver for RTL8187L and RTL8187B. Rtl8187 is part of the official Linux kernel. Starting with 2.6.27, this driver is supported by aircrack-ng.
To use the driver with aircrack-ng, it's recommended that you apply the following patch: http://patches.aircrack-ng.org/rtl8187-mac80211-injection-speed-2.6.28-rc6.patch