It would seem that attwifi SSID does not work anymore for me, even though it had been working just fine for months before.
As soon as I changed the SSID to NZ@McD1, it works just fine. Received 6 streetpasses on my wifi card's mac address (the one I PMed you.)
I have yet to check if your 3DS was tagged to my wi-fi card properly however. I'm not sure if you tag a certain mac address under attwifi if it also tags the same hotspot under NZ@McD1.
I didn't get any Pokémon streetpasses however. I'm thinking it may be due to that one glitch you mentioned where streetpass cancels out streetpasses from the last game you activated it on, which makes sense because out of the six tags I got, 3-4 of them had OR/AS as their last played game and I didn't get a single OR/AS streetpass transmission. I did, however, get Streetpass Plaza, MK7 and Smash Bros. tags, which happen to be the only other titles I have streetpass enabled for.
I'm going to re-download SwapNote and enable StreetPass on it like you've suggested.
Aaaaaaand it says eshop is under maintenance when I try to connect to it on a different network. Nice.
(One annoying thing with the NZ@McD1 SSID, you cannot access the eShop when connected to it.)
Either way, do you think you could try tagging my mac address under NZ@McD1 instead of attwifi? It looks like my 3DS isn't going to recognize attwifi anytime soon, so...
Thanks for taking the time to tag all sorts of mac addresses just to transmit the Eon Ticket to other people, even though you have nothing to gain from doing it.