Earlier quoted context omitted.
I do already have an oxo probe ( http://www.oxo.com/p-558-digital-leave-in-meat-thermometer.a... ) that works well, will have to see if the wife would be willing to let me hack it up a bit.
What is it rated to? I am looking for one that will work for the oven and not just the meat.
If you feel creative, you could try to build your own temperature probe using Arduino + LM35 sensor + stainless steel tube + some solder.
The datata sheet claims, it can read temperature between -55°C - 150°C, but I never tested its limit so I have now idea how far you can actually push it :)
In any case, like HeyLaughingBoy have said, if you want something which goes higher, check thermocouples.