If the Stealth API turns out to be something very interesting, I'd consider dusting off the ScriptUO project to make it so you could run and debug Stealth API scripts. If anyone tried UOMachine, it would be similar only done with MUCH less skill than Xenoglyph had. 
The Api works as Followed :
You can write and compile an application wich use the script.dll ( its written in Delphi ).
You need to start Stealth and select your application as "Script"
you press play and Stealth will execute application and handle the data through a pipe.
Using dll standalone wont work. Dll currently have around 5000 Lines code, thats just a small piece of stealth.
For .Net iam on working for a small .Net dll handling the script.dll, the sourcecode for the handler classes will be public. So anyone who is interested in can take a look how it worked in .Net.
If Vizitor find enough time he will provide a Unit for Delphi doing same. If not i may will provide this as well.
From this point anyone will be free to do whatever he want.You could write Scripts wich interact with streams, web , databases. You also could write your own scriptlanguange with editor if you want...