Speaking of which, seattlewireless has a [pretty good page] on the Senao/EnGenius cards that [Netgate] sells. Their [Hot News] page has links to some good deals on antennas that will work with the EnGenius cards on laptops. And [this post on coderlog] will clear up which port to use on the card.

And if you hadn't heard, there are now [antennas available] to extend the range of internal Titanium Powerbook airport cards.