ThinkPad Mini-Dock

IBM ThinkPad Full Dock II The ThinkPad Mini-Dock (Model # 287810U) offers a good compromise of features and price. It contains basic pass-through connections for all the notebook ports like the ThinkPad Port Replicator II does. Features everything the ThinkPad Port Replicator II has 4 port USB 2.0 hub Integrated power supply Integrated key-lock for securing the ThinkPad to the dock Pros & Cons Positives: Integrated Power, Integrated 4-port USB, security Negatives: Price ($199 Retail) Compatibility: X20/21/22/23/24/30/31, T20/21/22/23/30/40/41/42, R30/31/32/40/50/50p/51, and A20/21/21e/22/22e/30/31 (Does not support X40/41, R40e/50e, or G40) Warranty: One Year IBM Website for Mini-Dock

4 port USB 2.0 hub

Note that the USB provider is a hub - a few people have reported some USB peripherals (such as Palms) having problems due to it being a hub, although the majority of people do not have this problem, and the usefulness of the 4 port hub outweighs any potential downside. If you encounter problems, you can always use the USB ports on your Thinkpad to get a direct connection.