amazon ec2 - How best to have many users control EC2 instances? -

summary: how can several developers able start , stop shared amazon ec2 instance?

i've got project i'm using ec2 instance work persists day day, 'start' server when come office, , 'stop' when leave. work several other developers , use ec2 instance. we'd first person start work each day 'start' instance, , last home 'stop' instance ... can't 'start' or 'stop' instance. (they can launch other instances ami if give them launch permission, new instance. particular instance persistent machine state yesterday.)

we on consolidated billing account, gives no access rights. i'm looking @ amazon iam, seems needs overhaul of our current user setup (1 developer = 1 aws account, account under consolidated billing) disruptive if doesn't work, or if there's better way achieve same goal. (and frankly, i've not got toy script work yet under iam either, though suspect iam correct way approach problem - need read more)

any suggestions how best manage shared instances?

thanks!

ps various reasons, don't want have cron based solution; machine run on if we're mobile laptops , have no fixed infrastructure? timezone assuming? user cronjob running as?

aws identity , access management: http://aws.amazon.com/iam/