Just to follow up . . .
Thanks Smart Little Lena, Night Mode works just as you describe. Given how it works, I'm a bit surprised that it also appears in a configuration menu. Rather pointless, IMHO.
Regarding the "remote control jacks for external sensors", according to Outlaw support these are two contact (i.e.: no power) jacks compatible with the output of IR distribution amps such as Xantech. So, connect the 950 in where you would normally plug in an IR flasher.
Also from Scott, unfortunately, the IR control code set is known to be unique. This means it is impossible to use any exisitng non-learning remote with the 950 (unless it explicitly supports the 950, which is unlikely). So . . . I can't control the 950's volume from my Tivo remote.
-Gary