well, you can grab a dell latitude d600 refurbished with warranty on ebay for around 300 bucks. The Pentium M is still more than enough power for basic computing.

otherwise, you can wait for some deals for laptops around $500-600 from fry's, circuit city, best-buy etc. Or...you can configure a dell/hp for something of a similar price. The base price for a 1501 is $599.