As a followup, I'm happy to report that the International Documentary Challenge DVD (which includes one of our short films) has moved from #48,323 in sales in Movies and TV to #35,590.
That's right. It's 12,733 better.
Which, I suppose, is not bad. (I'm a little afraid to compare it to other items, because I'm sure with some careful searching you could find it's being outsold by ... well, I'm sure there's a lot of embarrassing possibilities.)