"The thing is, there's only six sides to a block" -Direwolf20 Not anymore!
With the Tile Interface, you can interact with any block at a distance! Simply craft your interface with some lapis lazuli, nether quartz (any form) and an ender pearl, then place it against another block. You can now access the block the Interface is pointing at through the Interface. The interface will transfer right-clicks (enabling you to open GUIs), inventory, liquid, and Buildcraft power as if the Interface didn't exist.
For a better understanding, just watch my YouTube video, or just download and try it for yourself.
This mod only adds this one block.
Install Red Gear Core1.
Toss the Tile Interface jar into the mods folder.
1Must be version 2.0.2 or higher