Considering 4.0 special offer.....

Since there will be no annual renewal, what will the cost be to upgrade to a newer version of vBulletin, ie. 4.2 or 5.0, etc?

The annual renewal provided a predictable cost structure. If you come out with a new version ever six months or whatever, what will it cost to maintain?

I am looking forward to the CMS. I hope it is the quality I have come to expect from vBulletin. I have two current licenses. $260 is quite a bit of money to me. Will I have to pay that on an annual (or more often) basis?