VinRouge was asking why you shouldn't, and multiple answer was that you shouldn't..., well, so much for CRM.
The problem is that below a certain speed, air is faster blown forward from the reversers than the forward speed of the aircraft, so the air will get sucked in from the engine. This can cause engine stall, ice accumulation if ice/snow is sucked in and FOD particles are sucked in. This forward speed is defined by 60kts by AI and is more or less the same for every aircraft of this engine configuration. That's why you should always select reverse off under 60kts, unless in emergencies.
finncapt, it's very unwise if you use it in your situation in STR. It may help to take off with hot brakes, but following costs for engine overhaul will be much higher, or someone will maybe even have engine trouble. Better wait until your brakes are cooled down and then take off.
Dash&Thump, slow taxi is indeed the menu-du-jour, but not braking with light dabs. You have to brake hard. The suggested brake technique for cool brakes (and less wear) have been described here lately: Accellerate to max taxi speed (i.e. 30kts), brake it down to around 0 (5kts is more realistic), let it accellerate to 30kts again without braking and so on. When you brake, brake moderate, but brake remarkable. Never ride the brakes!
Dani