in theory the driver comes integrate since power kernel 47 and if you try to connect a rtl8187 wifi card to n900 through HEN if you look at kernel output in HEN console it recognise it!! but then if you go to terminal and prove ifconfig or airmon-ng dont recognise it so it is kinda confuse because if "ifconfig" dont recognise it means the kernel dont it too.

This thing break my mind for a long time, because i was very interested in connect external antennas to N900 and i prove everything but get nowhere. I think only pali or someone a that highest level of skill has the power and knowledge to make this work.