Thanks for answering, looks like you have some interesting projects on the go. My favourite was http://50pop.com/karmalist http://50pop.com/karmalist if only b

Thanks for answering, looks like you have some interesting projects on the go. My favourite was http://50pop.com/karmalist http://50pop.com/karmalist if only because someone needs to kill Yelp ! An open source, non company-controlled business review service is a killer proposition. The challenges will be how to incentivise users to submit reviews to the service (what's their motivation ?) and how to successfully moderate extreme or unhelpful reviews in a scalable manner.