Here you see stage one. I fix a Nut to the underside of the miniature I'm working on using superglue. I have to emphasise here not to use too much glue. I put 5 tiny dots of superglue on the bolt then placed it in position. This is enough to hold the bolt to the miniature but provides a weak enough bond that the nut can be snapped off when finished without damaging the model.
With the nut affixed to the model, and the glue dry, I then screw in the bolt. Don't over tighten as this could snap the nut off the model or even damaged the miniature itself.
I have found that this arrangement is more than strong enough to provide a stable 'handle' on the model without being too intrusive (unlike blue tack which needs a large surface area of contact to provide a similar strength bond).
As has already been mentioned, when finished the nut & bolt 'handle' should snap off easily without damaging the model - provided you glued it into place sparingly. I have a wooden 'drying rack' consisting a series of holes drilled into a piece of wood. When I need to stop painting to allow paint to dry I put the bolt into the hole and it holds the model securely in the air and, crucially, untouched by any surface (which might blemish the drying paint).

I touched on the issue of scale in this blog
Web Cams could, in theory, enable players to participate even if they cannot physically make the game. Aside from the technical issues involved - complex but not insurmountable with some planning & forethought - my main concern is that this would undermine the very reason we gather together in the first place. For each others company. Half the group consist of 'new' members that have joined the original core of players from my school years. But it's not just the game that holds the group together its the fact that we like each others company and we're good friends. Using web cam technology may help us continue the game but it might forever break the atmosphere of our game sessions which often involve lots of laughter and a beer or three.