Can anyone recommend a good service for getting flight status updates to my cell phone or my Blackberry? I need to be able to get flight status for a bunch of airlines, because I care about flights for lots of different people. I don't want to have to query or set things up with all these different airlines, or keep querying for updates about the same flight. Ideally, I also want an easy way to copy someone else on the status that I receive.

I found a service out there called JetAlerts which looks really good, but you can only use it if you book through a travel agent that has it. Their web site says they're coming out with a public version soon, but if anyone knows of something I can use right away I'd appreciate the info. Thanks.