I've got one. I got it to replace the Linksys WAP54G that has been fading in and out and generally driving the household crazy. So far, the KWGR614 has been supplying a much more stable signal.
Trouble is, it's blocking DNS requests. I think it has something to do with the "clever" DNS trap that lets you connect to "myrouterlogin.com" to configure the router. I don't want it to do that. I don't want it to attempt routing at all -- I have a separate box for that. I want it to be a WAP and nothing else. (The WAN port is unconnected.)
I grabbed the source code, but all attempts to compile even the default configuration have failed so far. So now I'm casting about for help or solutions.
Apparently no one has tried to get OpenWRT to run on this thing, either...