Ah, I did not realize you could develop using SQL Server and than package it up for the end user using only a runtime.
I have a lot of beefs with SQL Server besides the fact it is M$, but it certainly beats the crud out of Access.

For years, non-biased performance tests show PostgreSQL and MySQL and just about everything else to leave SQL Server in the dust. Its been 18-24 months seen I've seen a recent performance test but I can't imagine all that much has changed...its still M$ afterall.
That and the fact I don't own SQL Server was why I was thinking of going the open source DB route. Although, I do have the .NET development kit which includes that limited connection SQL Server for single user development. But your point about not being able to edit the data is probably the best reason yet to not use SQL Server. A lot of folks like to go into Access and poke around and try to figure out problems or whatever. Using a high cost DB like SQL Server would take that away from many folks.
Certainly do not step aside. If a project like this gets off the ground any and all experienced voices would be good to have around. Regardless of your development experience everyone will have something valuable to offer from the users to other experienced developers. For example, one of first things that would have to be done would be to design the data schema. Cato is great, but I'm sure you've seen the database.

Its sorely needs improvement. Even if you can't write a lick of whatever code the project is developed in it certainly sounds like you'd have valuable input in building a better schema.
I've been delayed at kicking off some of my projects in my head. Working for a living sucks, but sometimes it seems I got so many damn ideas I can't decide where to start or what to do first.
I been wanting to set up a site for folks to get together and work on new OOTP utilities for while. I reserved some domains and was planning to set something up at
www.ootpvault.com (currently just points to my league). I've been delayed but have also been waiting for more news regarding v7. But this discussion is probably just what I need to give me a kick in the pants and start thinking about this again. CATO for v7 seems like as good a place as any to start because it seems to be far and away the most used and loved OOTP mod there is.