We're working with a potential customer who is using force.com's sites feature to host public facing websites. From what I can find, there seems to be a limit of 25 sites for the Unlimited account level (which they use currently): https://login.salesforce.com/help/doc/en/sites_limits.htm
Some discussions (http://boards.developerforce.com/t5/Force-com-Sites-Site-com/Sites-Price-amp-Availability/m-p/183240/highlight/true#M2766) I've read indicate that it's not possible to increase this limit. Can anyone confirm if this is the case (or not)?
I'm not able to find pricing for additional sites anywhere, either - if you have managed to increase your limit, how much did it cost?