Well, I've been reading since page 8, and since I haven't seen it yet, I think it's a good time to quote Merric's Law of Minatures: Non-Random Packaging, Cheap Prices, and a Large Range of Figures: Choose two.
Now, the idea another poster had about WotC reissuing all old(say more than 1 year out of circulation) miniatures individually for $1 commons, $2-3 Uncommons, and $4-5 Rares seems like it might have the possibility of breaking Merric's Law. You'd want to use a slightly different paint scheme, the bases would not have the collector's information, and there would be no card, but I can easily see them do something like this and have it open for DDI customers like the original poster suggested. That way there's no competition with what is currently on retailer shelves, WotC gets to use the molds they've squirreled away, and collector's value goes down a bit. Hell, it's already gone down, I have lots of Harbinger-GoL minis and except for the rare Huges, most of them have gone down in value greatly. I remember when Umber Hulks were $60 on eBay and now they go for $20.
What I would like to stress to Trevor is that when you're assigning rarities, please make sure to follow MM creature guildelines. We need uncommon fire and frost giants as well as cyclopses. We need at least two uncommon dragonborn sculpts.
I also like the idea of a yearly (or twice a year) non-random set of minis. Make it $30, include around 12 minis, 2 sheets of dungeon tiles, and a 3-encounter delve.