Take a look at the TK201 on this page: http://www.mr-lee-catcam.de/pe_cc_o2_en.htm
It's designed for tracking pets but if you spend 10 minutes reading through the PDF on the site you'll see that it has many features and talks over the GSM network via SMS. I don't have any idea how far up you can get GSM coverage but on the way up and as it falls down you can track it.
It's about £90 which seems quite good for the features it has to offer.
Cheers, I will have a read through. I did notice it features an SOS button, remembering this is for pets....
Is this due to the SD card, batteries or a limit of the camera? If it's the batteries then you should be able to rig an external power supply.
From reading on here its a camera limit, will have to look into it when I get mine.