Is the time saved by using Sift really that much better than just doing this myself?
Of course with Siftnet you cut down on the back and forth but more importantly you've given the other person an opportunity to find a time with you as soon as you send your first e-mail to them. You don't have to deal with the delay of back and forth emails or people going on vacation half-way through the meeting negotiation process.
Does this work for only gmail or does it work with exchange?