Hiya,
I came across this yesterday and thought it could help someone.
java platform versions and screen sizes 28 january 2008-1.pdf
Thanks for sharing. Although this PDF seems not up-to-date since
phones like C702 for example are missing. Nevertheless, the SE
developer pages offer some valuable information and tutorials.
For a recent tech-info list you might also try:
http://developer.sonyericsson.com/site/global/products/phonegallery/p_phonegallery.jsp