Couple of feature requests
The first would be to get per-line (or per-IL) timings for assemblies that we don't have the source code for. This would be useful when working with third-party libraries. IL timings would be good, but even better would be per-line timings using a technique like Lutz Roeder's .Net Reflector uses to reverse the IL into code.
The second would be to allow per-line timings for the .Net framework code that Microsoft released earlier this year ( http://referencesource.microsoft.com/serversetup.aspx ). Currently we are doing a lot of profiling of the DataSet classes, and this would help a lot with that kind of work.
I have no idea how practical these ideas are, or even if they are already available (please let me know if they are).