re: What if my application is really two applications bundled into a single file, and I want them collected into two groups on the taskbar in Windows 7?

I wish the grouping behavior was more directly under control of the user.

Many applications today are web-based.  I see no reason why the browser instance I have open for email (er, webmail) should be glommed to the browser instance where I do my MSDN searches, the one I use for accessing the bug database, or the one where I read blogs during long compiles.  The only way to handle this today is to use a different browser for each task.