I need to terminate 2 x FEthernet WAN connections and provide a 1 x LAN connection on a Cisco 2800 series. I thought that purchasing the basic 2801 together with a HWIC-1FE interface/module would be sufficient. Can this single HWIC-1FW module be fitted into the 2801 without much trouble? Just can't seem to find much info on CCO though it does mention that the 2801 can support HWIC-1FE interface. Thanks.
Yes, you can put up to two HWIC-1FE in the 2801. See:
But at that point it may make more sense placing a cheap L2 switch and doing the routing with VLAN subinterfaces using the two FE ports the router has already.
In any case do not expect routing to run at FE wire speed using a 2801.
Hope this helps, please rate post if it does!