Just as a quick aside, if I could get it working, who would be interested in a Tekkit server via Hamachi? (probably, since it's the only way that I can find that works for this setup).
Tekkit allows pipelines/quarries, and lots of other technology, but at the price of being a little behind the curve with standard MC updates, and, being a player-created collection of plugins, is probably also less stable than common-garden Minecraft.
The downside to Tekkit is that you would need to download a special MC Loader based on Spoutcraft, so it's a bit of a job to start with, so I'd like to get a general sounding before I try
