I stop towards the middle of the right-most lane, if I'm first in the line and a car behind me wants to turn right, I'll slide sideways to make enough room for him to squeeze through and turn if he wants and give them a wave/point to indicate that I'm cool with them coming up and turning right. I try to stay to in the lane enough that people who want to go will stay behind me though, rather than passing on the right as soon as the light goes green.
I figure that way I'm still asserting that I'm in the lane and negotiating the intersection as part of traffic without ignoring the fact that, as compact as a bike is, it's simple enough to move aside for someone who doesn't need to be stopped.
I've gotten a lot of thank you's and the like for doing it too. Don't know if that would have happened if I'd just been out of the way to begin with or not, but I'd like to think the fact that I'm actively being considerate and what have you makes a positive impression on people