If possible, and if it wouldn't cause other problems, I would like to see an option, during installation, to configure SME as a DHCP client when choosing Server-only mode (with a single NIC).
This isn't a hot-button problem for me at present, but I think it might become one. It would also simplify installations into networks where some other device is the gateway (and DHCP server) - especially if the installer doesn't have access to the gateway device.
Inside a fully-functioning network, where you're just adding a server, DNS name resolution works very well for access to files, web sites, etc.. Static IPs for servers are not as necessary as they used to be.
I think the software to do this is already there, it's more a matter of what screens you see during the install.