Hi, are you looking for an application which can convert to HTML (or online web pages) to PDF or PS ? Yes, you have that! Its available under GNU General Public License (GNU GPL) and also under commercial license. Though the version available under GNU GPL has some limitations... but its enough for an home user...

The software's name is HTMLDOC. You can download its GNU GPL version at www.htmldoc.org

Its highly efficient. I converted a single html file of PHP manual to PDF of 11 MB with "Best" mode compression in less than 5 minutes. The PDF version contains 4261 pages!!! Imagine! That too on a P3 500 Mhz with 384 MB RAM.. If you have a better CPU then it might do it even much more faster! ;

Here's a sample screenshot -