I have three 20 character x 4 line VFD displays. These are serial port capable just add a resister and a serial connector. These displays are way better than LCD because they are daylight readable and very bright. They require about 400 ma at 5v.
This is one in action:
http://www.iamjeremy.com/~sirius/stu...Spcr/front.jpg
I also have CP2103 USB to Serial boards. I've added one to one of the displays and it works great. the display uses the USB power so all you need is a USB cable, no power cable required.
Price $40 for the display alone. $60 for a display with a USB board. I have three avaialbe. Paypal only. 1st class mail shipping included. Add $4 for priority Mail.