Logic has a feature that allows you to skip an entire section of a song, it would be nice to see a similar feature in Sonar.
Basically you mark the section you want to skip, then when you play the project back the song skips the marked section and keeps playing at the end of the section. This would be really useful for arranging.

Cubase has a feature where if you create a "negative" loop it skips.  In other words, if the beginning marker is to the RIGHT of the end marker it skips.   Simple and elegant.
 
 
 
 

As an extension of this one?    Sure.  
http://forum.cakewalk.com/An-arrange-window-m3104937.aspx