Board Thread:Questions and Answers/@comment-74.120.190.101-20121219154407/@comment-5796218-20121220035230

Filters and Transposers will both either pick up stuff that falls into them (e.g. something dropped on the ground directly above them) or will suck in a 3x3 or 5x5 area respectively when given a quick redstone pulse.

Shearing a large amount of sheep (using dark or red matter shears) may drop a Loot Ball (i know it does when using the Axe but I haven't sheared sheep myself) so you will need something else; like an Alchemical Chest with a Black Hole Band inside.