I've never had to use my ExpressCard slot, as nothing really seemed soooo useful that I just had to get one. This olllddd list from laptopmag.com though is very sensible:
So we've got: A dock connector, CF adapter, two mobile wireless broadband modems, TV tuner, and Bluetooth remote. Aside from the CF adapter (CF is so dead), do these accessories still make sense? Are there newer better versions that people should be looking at? Appreciate any thoughts.