kowalachuckie
Thanks for your input! I know this is an important feature, but it is much more difficult to implement than it was in Joomla! 1.0. Fortunately, the non-SEF URLs do still have the category and article names in them so they are more "search engine friendly" than links were in 1.0.
That said, I have worked out (on paper) how I will set up the SEF links, but I would like to ask everyone who has PHP and Joomla! 1.5 extension development experience to go to the support forums for this extension (link is above) and share any ideas you might have about how to go about actually making SEF work, even if it's not actual code, but ideas on code layout or ANYTHING. It would be of great help and I would happily credit you for any work you did, both in the code and on the site.
This is definitely a feature I want to complete, so I promise I will keep trying until I figure it out!
Thanks again for taking the time to review!