APEX 3.2 has just been released and you can now download it from OTN here.
As previously noted, there is new documentation, Oracle by Examples and other updated content on the APEX OTN Page.
With every new release there are a number of additional security enhancements the development team adds. However, this release introduces a significant number of new security capabilities. So even if you aren't interested in converting Oracle Forms to APEX it is still strongly recommended that you upgrade to this release as soon as possible.