Information on how to pull data from the secured parts of the SL website...

Here's the download link for libcurl.NET (the successor to libcurl.mono): http://sourceforge.net/projects/libcurl-net/

It consists of three dlls, a libcurl dll, a shim to connect libcurl to managed code, and the C# assembly that you add as a reference in your project. Then you have the full power of curl in a .NET application, it's very cool. You can reuse the code I posted to connect to any password protected page on LLs site. Writing the parser/scraper is up to you, although I included one for the buy orders on the LindeX page (advanced view).