Can Someone Tell Me What This MyWi Symbol Is?

[benh911f]

So I downloaded the 4.3.1 JB for my iPhone 4, and connected to my non JB iPad (4.3.1) via MyWi. However, instead of the normal wifi symbol, I got these two interlocking circles. Can someone tell me what this symbol means?

 

[galanoth]

personal hotspot

 

[benh911f]

Am I more likely now to get one of those emails from AT&T going around now saying I'm using the personal hotspot without paying? Does this send data back to AT&T showing I'm using the personal hotspot, as opposed to it appearing that I'm connected via wifi?