iphone OS 4 still doesn't actually offer multitasking as developers have been asking for. It's a list of seven things apple have decided are allowed in their walled garden. Push notifications wasn't a satisfactory answer when people wanted multitasking, but suddenly "pandora will work" or "flickr can finish downloading one photo" is a beautiful panacea? Come on.
Rev can log your journeys right now. It can't log your journeys when it's "multitasking". This is a direct impact on people on this forum.
This is not multitasking. Don't bother to reply "waa waa battery life" or any of the other justifications that apple spout; the longest battery life in the world doesn't help if I can't actually do what I want with a device.