I was thinking that the kits could consist of different portions of the blend options. For instance have a flavored black kit which would contain a number of flavored black teas (although since that's the largest one it would probably span multiple) and then a green kit and so on and so forth.
I like mary's idea too about letting you choose, but i didn't know if that would be a bit harder to end up making since each kit would be different, with a Set A, B, C, style you know what you have to fill it with.
What would make this way ultra crazy awesome cool would be if they had a nice wood/bamboo tea chest to go with it, basically a multi slotted box to either just fill (although that probably wouldn't ship well) or fit in sampler tins in. I have seen a lot of these around, but none that would be good for loose leaf only teabags, but if you could find one that was suited for the sampler tins that would work perfectly.
(I'm amused how my idea went for 10 days without a peep and then BAM)