The link I gave was to the specifications of One-Net as a standard. Only after your reply I have found that there is a link(to another site) to buy a board. And that board is evaluation module so I suppose there are some extras on it. But may be I am wrong so I checked on google - if I am right the chip(only the chip) that is used costs 3$ (analog.com).
Still, I am not defending that standard - I know nothing about it. That is why I am posting here - to ask. I was searching for cheep wireless solution and that one was the only one I have found that is under some kind of standard (the other is JN3 from Jee labs based on RFM12b which is very nice, but not under a standard)