I had this idea...
http://ftbwiki.org/U...Recipe_tracking
Crafting grid templates could automatically set a SMW subobject storing a single input/output pair. This might not be the best way to store recipes (especially with more than one input AND output) but it is easy to query and use to generate usage lists. These of course won't be full grid templates, but a list of itemrefs of possible output items. Any more detailed information can be found by clicking the link, which would make the usage sections MUCH easier to maintain. If we could make this use Nulifier's dynamic table CSS it would be even better.
Technical stuff:
Multiple identical pairs on one page will not duplicate, because SMW uses a hash of the subobject's properties and values to generate "unnamed" names. It might be better to generate names like "Stick -> Wooden Pickaxe" so there won't be any cross-page dupes either.
According to the parser timing data shown during page preview this also shouldn't have any major impact on parsing time, definitely not as bad as the infoboxes