Since 10.7.2 it is possible not only find my iPhone, but also to find my Mac. I’ve added all of them to the iCloud service and used the sosumi php scripts to get the data.

This is an example of what you get returned:

Sosumi Object
(
    [devices] => Array
        (
            [0] => SosumiDevice Object
                (
                    [isLocating] => 1
                    [locationTimestamp] => 2011-10-16 07:04:02
                    [locationType] => GPS
                    [horizontalAccuracy] => 30
                    [locationFinished] => 1
                    [longitude] => 11.47XXX6
                    [latitude] => 48.155XXX4
                    [deviceModel] => FourthGen
                    [deviceStatus] => 203
                    [id] => XXX
                    [name] => Tyr
                    [deviceClass] => iPhone
                    [chargingStatus] => NotCharging
                    [batteryLevel] => 0.8080169
                )

            [1] => SosumiDevice Object
                (
                    [isLocating] => 1
                    [locationTimestamp] => 
                    [locationType] => 
                    [horizontalAccuracy] => 
                    [locationFinished] => 
                    [longitude] => 
                    [latitude] => 
                    [deviceModel] => MacBookPro5_5
                    [deviceStatus] => 203
                    [id] => XXX
                    [name] => MrT
                    [deviceClass] => MacBookPro
                    [chargingStatus] => 
                    [batteryLevel] => 0
                )

            [2] => SosumiDevice Object
                (
                    [isLocating] => 1
                    [locationTimestamp] => 
                    [locationType] => 
                    [horizontalAccuracy] => 
                    [locationFinished] => 
                    [longitude] => 
                    [latitude] => 
                    [deviceModel] => Macmini4_1
                    [deviceStatus] => 203
                    [id] => XXX
                    [name] => Tardis
                    [deviceClass] => Macmini
                    [chargingStatus] => 
                    [batteryLevel] => 0
                )

            [3] => SosumiDevice Object
                (
                    [isLocating] => 1
                    [locationTimestamp] => 
                    [locationType] => 
                    [horizontalAccuracy] => 
                    [locationFinished] => 
                    [longitude] => 
                    [latitude] => 
                    [deviceModel] => iMac8_1
                    [deviceStatus] => 203
                    [id] => XXX
                    [name] => McU
                    [deviceClass] => iMac
                    [chargingStatus] => 
                    [batteryLevel] => 0
                )

            [4] => SosumiDevice Object
                (
                    [isLocating] => 1
                    [locationTimestamp] => 2011-10-16 04:35:46
                    [locationType] => Wifi
                    [horizontalAccuracy] => 100
                    [locationFinished] => 1
                    [longitude] => 11.47XXX3
                    [latitude] => 48.15XXX8
                    [deviceModel] => MacBookPro3_1
                    [deviceStatus] => 203
                    [id] => XXX
                    [name] => McFly
                    [deviceClass] => MacBookPro
                    [chargingStatus] => 
                    [batteryLevel] => 0
                )

        )

    [debug] => 
    [username:Sosumi:private] => APPLE_ID
    [password:Sosumi:private] => PASSWORD
    [partition:Sosumi:private] => p04-fmipmobile.icloud.com
)