My office set up is:

Two laps that each need to access the two printers and a scanner. At times one of the lap tops may be out of office so how best to set up? We have a wifi router for the BB.

I want a box that i plug the 3 devices into (USB 2?) and then that plugs into the router and all the pcs can then get to those devices.

Simple?

 

Yup.
Belkin : Network USB Hub

Not actually used but really like the look of them.

 

perfect - can hold my remote back up as well!

 

Yep, only downside is you need a client per machine and there's no simultaneous access but for printing or scanning you don't need it, disks you can kick people off if you need.

It's not a NAS or print server or usb switch but designed pretty much for your scenario.

 

It's just for me and my PA so seems perfect. Disk access - i just set the laptops to sync at different times (assuming they are in range)