You know i always come up with interesting ideas. The one i had on recent playing with the reactor planner is kind of a big one tho.
What, if you could link a Pneumatic Tube from Redpower 2 with a link card and display the amount of items(or in case of IC² most likely Ice) going through a pipe.
If that don't work, the same idea could also work on Buildcraft.
I know i know, Eloraam isn't much of a fan of people using her stuff, talk to her maybe you both can come up with something. It would definitely be cool to at one point being able to precisely measure the various Minecraft related Tech Mods and generate precise statistics and controls for very complex machines.
Sorry that I'm dumping my imagination on you, but it seems to inspire, even just a little bit.