Hi Guys. I just set up my MikroTik router (RB591Ui-2HnD) as a StreetPass Relay but it should work with any wireless MikroTik/RouterOS device. I've also configured it to auto-rotate ~190 MAC addresses every 24 hours (~1 pass every 8 minutes).
If you're interested in doing this yourself AND you...
I had this problem. It was showing people up into the mii plaza, but not bravely default. Turns out it's something to do with the limited amount of data that is sent during a streetpass, it may end up spending the entire time just sending streetpass data for one of your other applications.
To...