[Seeker]

Bad luck! Repair? This would rather depend on your personality ie how cautious you are. The tyre industry prefers you to buy a new tyre (duh!) rather than get it repaired. Their argument being that your safety is resting on a tiny contact patch at the best of times.
Having said that, I have ridden several thousand miles on repaired tyres - a couple I repaired myself with sticky string and one that a tyre fitter repaired using a mushroom plug which is probably the best option. I'm generally a slow rider though. If you're a spirited (!) rider then I'd get a new tyre, if you're cautious or if it's just for low speed commuting then I'd go for a (professional) repair, I wouldn't use the slime.