Skype for Mac 2.5 is now available in its final (“Gold”) release today. Version 2.5 features “the ability to send SMS messages to any mobile phone in the world, bringing friends, family and colleagues yet another step closer. Also, Mac users can now use Skype to hold conference calls with up to nine other people. Calls can be made to Skype contacts for free and to landlines and mobiles for a small fee, via SkypeOut. So, whether your contacts are in one city or scattered around the world, you can now get together to share a laugh or hatch the next killer business idea without hassle.” In addition, today is the final day for Skype users in the US and Canada to subscribe to the Skype Unlimited Calling plan for the introductory rate of US$14.95 for 12 months of unlimited SkypeOut calls to landline or mobile phone numbers in the US or Canada — the price goes up tomorrow to the regular rate of $29.95.