Missing the old Symblics Select-L and Select-Control-L, I put together the following which will create a new listener and cycle through (forward or backward) the existing listeners. Comments welcome; I'm curious to know how to get slime-new-listener to work when the current listener is busy, because my main usage of a second listener is to do something while the first listener is busy, and unless I remember to open the second listener in advance, I'm still stuck.
Liam