During our manic 6-weeks of non-stop work, we had a break for a couple of guys from Greenfield Media to come over and speak to us about their work with an emerging market... Bluetooth Broadcasting.

Rob and Geraint gave a presentation of the work they've done in the past few years - notably in the National Eisteddfod and the Wales Rally GB. It was interesting to find out that its been an experimental ride for them so far.

They started off by sending simple text messages to people with bluetooth on, often on a very small scale (for instance - in a tent in the eisteddfod). They also explained of the difficulties they had at larger venues, such as Cardiff Arms Park - where they had technical problems that would mean that people got the same messages over and over again. Recently, they said, they've been experimenting with sending larger files and short animated adverts.

What made the presentation even easier to digest was they turned it from simply a talk, to more of an experience. They told us at the beginning to turn the bluetooth feature on on our mobile phones, and during the presentation, we'd get humorous interruptions by the ringtones going off - showing that a bluetooth message had arrived from the Greenfield laptop.

And, bluetooth broadcasting being a relatively young field (with only about 5 companies in the UK doing it), it can only grow in popularity. The possibilites are pretty much endless, and it'll be interesting to see where Greenfield will play its part.