Enkitec has free webinars on APEX:
APEX 4.2 New Features
08-MAR-2013, Online
29-MAR-2013, Online
19-APR-2013, Online
APEX at a Glance
25-FEB-2013, Online
01-APR-2013, Online
29-APR-2013, Online
eSERT Demo
11-MAR-2013, Online
05-APR-2013, Online
22-APR-2013, Online