It took me forever to actually try it out in the first place, because the router where I lived at the time had the right kind of encryption, but oh whoops for whatever reason this router is incompatible with the DS (it was actually on a list I found of incompatible ones), too bad for you. And no, changing the router was not an option at the time. So basically, even though I finally got a place where I could connect to it, the most I ever did was just look at things a few times, and then totally forget about it all. And even then it was just for Platinum.
So there's really not much for me to miss in the first place. I was like "eh" when they took them down.
Actually most of the routers had the option to change their encryption, so did mine. It also took me some time to figure out what was wrong, but once I did, I enjoyed every minute on the Nintendo WFC.