Sharon,
I've been using an HP laptop with an AMD 64 processor and 1GB of memory for the past two years--with great satisfaction.
I notice from a Fry's ad that there are two better and cheaper (alas) HP laptops for $999. The one that I think is marginally better has an AMD64X2 processor, 2GB of memory, a 160 GB hard drive, built in wireless, a DVD read/write drive, a 15.4" screen and Windows Vista Home Premium.
The other has the same price and has a slightly better Intel Centrino Duo Core processor, has 1GB less of memory, but it has Windows Vista Business, which may be a bit overkill on the operating system.
Both these machines would be excellent purchases, and with the Student Version of Office 2007, would last a long time. I would go with the first because of the extra memory. The processor speeds are ample for just about anything.
I don't know if there's a Fry's in your area, but the prices and models would be indicative of other places (where you might bargain), or you could order through frys.com.
rec