I like the "shopping list" they showed in the LL, but an ability to filter by currently possessed materials would be another step in the right direction. I'd also like to have an option to search by component (ie I have a stack of Thingamajig A, and instead of having to wiki what that's used for and then search for those individual crafts one by one, I can search "Thingamajig A" and get a result of all crafts that use it and start looking out the supplementary materials).