Not surprising that the loose set sold out so fast, because there were only 200 this year (probably to allow for more boxed sets to be produced to cover more pre-registrants).
2005 toys - 1,250 each (800 boxed sets, 450 loose)
2006 toys - 925 each (750 boxed sets, 175 loose)
2007 toys - 1,450 each (1050 boxed, 400 loose)
2008 toys - (unknown boxed, 200 loose)
The 2005 set was so unpopular (they still have it in stock), they dropped the number in 2006. But those were so popular, they increased it in 2007, which was even more popular. We could see another increase this year, plus the drop in loose sets will make for even more boxed sets.
The membership figures are posted out to all the members when they get them. That's even if the figure is ready by BotCon. It will be on sale there, but members will still get theirs posted out (that's what happened last year - non-members were able to buy one before the members got them).
You probably get a welcome email or something when they process your membership, because you have to know about exclusive access to their member forums and free magazine advertisement.