I am guessing with all this talk of music, movies, and games, RIM wants to be in the consumer market. Now, the challenge is figuring out if they are after the low end or the high end. If they are after the high end of the market, they ought to produce a high end product and price themselves accordingly. I think this would be a tragic mistake. If they are after the lower end of the market, they have to be at $199 or less.
There is no middle ground. $299 is an overpriced KF. $399 is a discounted iPad 2. Between $200 and $500 is no-man's land. Also, there is the profitability problem. A tab meant to be profitable at $299 is nothing more than a KF, which Amazon is selling at a loss. An iPad competitor is expensive to produce, not to mention the millions in R&D that RIM is simply not going to spend.
Ultimately, the question of price must give way to the question of why. Why is RIM even making tablets? For whom are they intended. What are they supposed to do. Only after those questions get solid answers will we be ready to speculate on price.