We'll publish all this information when we announce the details around the Ether sale. In terms of inflation, Ethereum will be dis-inflationary, that is, inflationary at a decreasing rate (and eventually nearing 0). More information at the announcement.
Also according to the whitepaper this is expected to reach an equilibrium with lost/locked coins. If 1% of coins are lost/locked forever every year, then after a 100 years the rate of creation should match the average rate of loss, creating a stable money supply.
Of course, stable supply isn't the same as stable price.
Answers
Of course, stable supply isn't the same as stable price.