I don't have pictures of my current setup, but it's a 12 cart long train that includes a tank, an admin chunkloader (computer not powerful enough for enemies, and so no ender pearl access.) and ten chest carts. I send it out to pick up from my quarry.
My previous worlds have included such features as a private minecart line that also shared track with an MFSU cart to transfer power to my wizard tower, because there was no transformation between EU and MJ at the time. Not that I had enderpearls anyway.
In 1.5.2 I had a minecart that rose from the depths of the ocean floor then sped along a a track to a processing facility. Then a second track that went way up into the air and carried processed materials to my home base.
Another 1.5.2 world had a massively long Railcraft line, for no good reason other than me being a compulsive looter, and I couldn't carry everything home, so I built a long rail line out to the place where I'd found all the storage minecarts and drove a locomotive out there to collect them. It would also have had a bee area stop off if I hadn't gotten bored of the world.
My previous 1.6.4 Monster base had a massive rail line running out to my quarry, a second line for my personal use. Then a line running a huge distance to the south where I was building an oil rig. Not that I needed it, but because I could. I even planned to lay rails all over the Outback biome I was near so I could procure oil from there. Then the world corrupted just before I started work on my massive train station.
I also had a 1.6.4 Direwolf pack that had rails running to my Ars Magicka area, and my mining area. Originally it was supposed to run several thousand blocks in every direction, but I got sidetracked. (Pun Intended.)