I have a plan:
We could set a percentage for demurrage (destruction) for say.... every...  year..., half year...or two years, this will have the media impact we need to have the coins promoted, and it will be sort of free.
At the same time we set a maximum quota to mine during a given time span, could be the same as for the time before the demurrage is set. The mining dificulty can be adjusted to comply with the quota.
Doing this we are not attached to a hard limit for mining new coins but we will be able to control the amount of coins available in the market. Lets remember this is a matter of offer and demand, the supply right now is soooooo big, no one worries the demand would be higher than the offer, therefore the value drops.