You could consolidate most connections to one USB2.0 port (ie. into a hub, then to USB2.0-100Mbit ethernet, external hard drive, TV tuner, keyboard, mouse, etc.), the monitor port and the power connector ... IIRC Targus and Belkin both sell USB "docking bars" (with serial, parallel, 2xPS/2 and extra USB ports) but those are probably more for legacy peripherals than anything else.
I'm still waiting for a docking station like the one I had for my old Toshiba Tecra 500CDT ... 2x ISA slots, 2x PCI slots, 2x extra cardbus slots (bringing the total on the laptop to 4!), onboard games port, extra audio ports, onboard SCSI, two extra IDE channels (well, 1.5 - brings total to 3 channels) ... and get this, motorised undocking!