Bitcoin is a deflationary system, where as more and more people start using the coins, these become more valuable. I think the growing awareness of Bitcoin largely outweighs the inflationary effect of the 7200 new coins that get mined very day, and that inflationary effect will halve in size in December. Basically, even with coin supply growing, coin demand can grow much faster, so I think we're already in a deflationary stage.
Yes, it's hard to predict how will the community anticipate the diminishing block rewards but Bitcoin is not deflationary. Right now inflation is still over 25% yearly, and in December it will drop to about 12%. That's still very high inflation short-term and mid-term. The question is how many people hoard, and what are the effects of the long term ~0% inflation, and also the fact that the underlying bitcoin economy might be growing faster than money supply right now.
But "deflationary" is a misleading word to describe bitcoin's planned money supply.
In any case 7%/week beats current bitcoin inflation astronomically and so it did in November when BCST began taking BTC.