Released
libprs500 v0.3.69 with the program web2disk. It allows you to download websites to your harddisk in a format that's suitable to run through html2lrf to generate a nice LRF file for your SONY Reader.
Code:
web2disk http://www.google.com
It fetches links recursively, by default to one level, so you can potentially download an entire website.
Enjoy and report bugs. This is a few hours work, so there are bound to be many.