Generally, graphic LCD modules above 320 x 240 resolution are available just as module and you have to provide the driver interface. You can still find some companies offering with built-in (LCD) controller. But they charge a fortune. For monochrome, there are quite a few controllers (seasoned) available such a SED1335 (Epson), T6963 (Thoshiba), etc. They have pros and cons, but workarounds are available. However, for colour I have not come across many. I have done some primitive work with SED1375. So I can't comment much.

You can look at the following websites to get the grip of it. This is not a complete list, but will get you going.

http://www.hantronix.com/
http://www.apollodisplays.com/manuals.php
http://www.citilink.com/~jsampson/lcdindex.htm
http://ourworld.compuserve.com/homepages...cindex.htm

Optrex makes one of the best LCD modules both character and graphical types and I have used them extensively (with 8052 family). The negative side is they are relatively expensive and limited in range.