For ANY RCT3 owner (Vanilla, Soaked, or Wild!), there have been new patches released.
For Base RCT3 [Update 3] - A slew of bug fixes, Custom Shops & Billboards, and many Soaked! features (including tunneling) have been added.
For Soaked! [Update 1] - Custom Shops and Billboards have been added, with a slew of bug fixes.
For Wild! [Update 2] - A fix for night lag, and installation issues.
These are major releases and added features for the non-Wild! owners. I guess when you throw game-advertising into the mix, they fix stuff.
To get the latest updates, use the "Check for Updates" feature.