As of 4th August 2014, Nintex Forms for SharePoint versions 2.3.3, and 1.5.3 are now available! This release of Nintex Forms for SharePoint is focused on performance enhancements.
To access the new builds, jump on over to Product Downloads (This area is only accessible for Software Assurance, and Premium Support customers. If you don't have permission to this area, please contact email@example.com)
Read up on the release notes here: