I hear you have plans for storage cells for it and monitor and etc. But yeah sending a single not actually any kind of physics and moving parts is amazing!
Storing liquids in ME network (so you don't have to build freaking huge tanks or the freaking expensive quantum tank) would be nice.
Fluid export bus, with a slot to place any container item to output stored liquid into the adjacent inventory (if supported), otherwise it doesnt work
Edit : @guy with permgen crash : Too many mods causes minecraft "secondary" memory to run out, so you have to increase it by changing that permgen config.
I have to use 256 MB for my MC to run...