Ok here is what has worked for me thus far (without any patches.)
Nintendo Wi-Fi Connection:
Play with Friend(s) - Haven't added anybody yet to be able to check.
Free Play - Working
Play Alone - Working
DS Wireless Play:
Form Party - Unable to check until my wife's AK2i arrives
Join Party -...
I don't think that's accurate. I didn't patch my Bahamut release version and I just got done playing in Free Play mode with others online as well as Play Alone mode.
The DSi can connect to WPA but PS0 won't use that connection unfortunately (at least I can't find a way to do it.) So I had to use a second router as an access point and use WEP, then I was able to get online no problem.
It's not the movies or games downloads that I would worry about, like breaking into networks, downloading encrypted things, spying on network traffic. I have seen so many "Top Secret" seals on files when I was a kid
I was obsessed with finding UFOs, a surprising amount of US files where stashed on computers in other countries, China back in the early 90s omg sooo much