Choosing the right staff, not only for Tech Support, but also for Sales, Marketing, Design etc. is a delicate process and it shouldn't be left to just anyone. The interviewee should be capable of not just compare facts from a CV, but to know what questions to ask, in order to get the best feel of the candidate. I would agree that experience is a strong plus, but this mostly is valid for the US and other bigger countries with lots of companies on the market, because otherwize the options for gaining this experience, are limited.
I would definately consider their interest in the area and their willingness to learn. After all, the training is where it all gets clear and where the skillful are separated. So when you have a strong core of senior staff, they can pass their knowledge to those "fast learners" and in the next training cycle they will pass their knowledge to the newbies and so on... This process also builds loyalty with your staff and makes them feel more involved :talk: