Linksys WTR54GS
Another option is the Linksys WTR54GS. This is a little travel router intended for use in hotels, etc. It is like a mini router/bridge in one small package. For WAN input it can either accept ethernet or wifi. In turn, it offers one ethernet port and wifi with DHCP, etc.
I currently use mine as a repeater to extend my wifi coverage. The only limitation I can think of is that when the WAN source is wifi, the signal must be open (based on an error message I receive). This is not a huge issue for me since my router supports VLANs - I have one VLAN for my secured network and a second open VLAN for visitors, etc. The open VLAN provides the source for the WTR54GS, which in turn extends my open network. Since it is downstream from my main router, the only risk is to my local open wifi signal.
When I am ready to plug my ViP622 into the network, I will probably use the WTR54GS to connect to my network. I like the idea of it being on a separate VLAN from the rest of my network traffic anyway!