Hi, new Eschalonite here, first post hey everyone blah blah...
If anyone here is really jonesing for the old Gold Box experience, you should check out FRUA, Forgotten Realms Unlimited Adventures. This is a builder that SSI made back in about '91 that lets you make your own Gold Box style adventures. Since then, it's been hacked to pieces by a small but devoted fanbase to go far beyond its initial capabilities, but it's still got that Gold Box style.
In the last year and a half I've spent large amounts of time playing a huge assortment of fan-built adventures. One guy made FRUA versions of about 30 classic PnP AD&D adventures and linked them up into a coherent campaign. Others have made their own adventures which are in some cases even better than the original SSI games. I'm slowly working on my own contribution, but keep getting distracted by stuff like Eschalon!
The web home of FRUA is at http://ua.reonis.com
if you're curious. There you can find out all you need to know to get it up and running; it's a bit tricky because of the hacks and because it's such an old game, but no hacker-level skills are required.