I found this over at PhoneNews.com:

Buzzirk Mobile reveals itself from the shroud of a Zer01-sized pyramid scheme, to showcase itself at CES.

Unfortunately, when we asked Buzzirk what network they used, they couldn’t answer.

When we asked what frequencies their phones operated on, they gave an answer that can only be paraphrased as “all of them.”

And yes, we have emails that say the same thing from Buzzirk.

Bottom line, once a scam, always a scam. Avoid Buzzirk.