If you need more than two persons to respond to a matter you need to discuss and resolve, it is often difficult to get a hold of them to put their responses together. Especially if some of them are in different timezones. A good solution is Relaytor. Relaytor has a very nice solution to this. You send out an email to the people involved, and Relaytor will gather the results and put them together.

Relaytor is quite useful. It will save you writing time and hours of questioning. Don't wait for your friends to tell you want to do, poll them. Get answers in a snap; everything is filed and aggregated for you so you needn't worry your pretty head about details. (KillerStartups

It might be a very interesting alternative to sending email. If you need to manage activities, being private or business, this one might save you a lot of time.