The plot thickens; see the full article for more details
Likely, Ellison's backing for JavaFX has two reasons. First, it potentially lets users of Oracle's Java middleware re-use their existing Java skills and technologies - that's the pitch Sun's been giving publicly and is likely to have given Ellison behind closed doors. It seems he took the bait.
More importantly, JavaFX is a Sun-owned technology, which - if the acquisition goes through - makes JavaFX an Oracle-owned technology.
Unlike the rest of the Java, JavaFX has not been submitted to the Java Community Process (JCP). Sun has never explained why, it's just dodged the subject saying it still believes in the JCP, which is like saying you believe communism is a good idea but that it's just not for you.