GPS systems for the mac

[tommyfullington]

I want to get GPS in my car. I have a 12" powerbook. I need something that will tell me directions etc. like http://www.microsoft.com/streets/ProductDetails.aspx?pid=001 .... Something that will read off directions etc. I'm thinking about doing it this way b/c it's the cheapest way possible. I'll probably build a laptop stand for my car, (im good with projects and have the tools.) but if anyone has a cheap solution... I'd love to see it. Thanks :)!

*edit*

There's no pc card slot in the laptop.

[tommyfullington]

http://www.deluoelectronics.com/customer/product.php?productid=138

[tommyfullington]

I've found Gypsy, macgps pro, and some new program made by garmin that I can't remember. I've found out that the tomtom 300 and 900 are mac compatible as well. I'm looking to spend below 300$ total. Any ideas?