Are those rubber bands something that came with the Hugo? seems a really clever idea and double as feet and bumpers :)
Yes these come supplied to hold a phone et al in place! Rubber feet on the bottom of the Hugo have been specifically positioned to stop a device from hitting the chassis.
1.) anything about gain switches - is there one? If so, what sort of gain levels are we talking about?
There is no gain switch on the Hugo
2.) and does the volume control control the RCA outputs? I've read conflicting answers to this.
There are two answers! If you hold the crossfade button down and turn the unit on, it outputs line level through the RCA's. turn it on normally and the volume slider controls the output level on the RCA. (If set to line level the volume can still be turned down in case you have headphones connected and need to turn it down quickly.)
3.) how much does it weight? I'm sure we can find numbers in grams and so on - but really how it feels in your hand? Can it be realistically portable, for example.
~330grams yes it is a TRULY portable unit. Not too heavy nor too big.
4.) there's mention somewhere about drivers for macs. Is a driver needed for mac osx and dsd?
Not as far as I know, MAC is driverless.
5.) can you post a picture of the charger? May be the specs on the back of it? (It'd be totally awesome if I can use some of my adaptors)
You, Sir, are a good, kind man. Someday, people will write songs about you.