To promote Vodaphone's summer of free roaming, they've set up this site which tracks where people are going on holiday, via twitter declarations. Nice, simple us of twitter, and a good way to assemble data and a few pr stories.
1) All posts should encourage conversation. 2) All posts should be positive. 3) All comments should be constructive. 4) Be sensible - don't reveal anything confidential. 5) Respect the poster - don't edit or delete unless it contravenes the laws above. 6) Post your name! 7) Mind your language.