interesting idea ... much like some of the surface mount socket clamshells.
i suspect the cost of development/production in such low volumes would make it more expensive than the cost of the module.
regarding the cost problem, it's unfortunately true.
i was crazily thinking of these
when i first looked into it.
the other day i realised that really what would be ideal would be as you've suggested, like the springy contacts on a SIM card holder. i thought they could be DIY made with bent paperclips or semi-heavy-gauge wire..
either way, a breakout board for the GE863 would be great. or a tutorial for reflow soldering it successfully (i feel like i'm trying to slave-drive the sparkfun crew!)