I agree that Panu should be commended for his efforts to help his fellow Sonar users and the solo button in particular was a glaring omission from the otherwise excellent flyout eq........................yep, here comes the but..........
For me it at least, it doesn't work properly. In console view, if I open the PC / flyout Eq, which is where I always do this stuff, pressing Panus solo button solos the highlighted (focus) track in track view, not the track of the EQ I am currently looking at, so I have to go back and shift the focus to the track I am trying to eq, it's no quicker than having to press the track solo button. I know absolutely nothing about how Panu works his magic, but if I'm looking at the eq for the bass track and I press the eq solo button, to my way of thinking it should be reasonably obvious that I want to hear the bass track in isolation, not the last track that I was looking at earlier in TV. Or maybe I'm missing something ? (quite possible!)