open outcast is pretty cool, www.openoutcast.org

though not complete there is a playable demo.

i think they are planning on it, i had a job interview at BigBig (i didn't get hired), they said that sony wanted all of its development studios to use maya rather then 3dsmax and they were in the process of switching apps, maya is far superior but they have to invest time to re-train their staff, i think its a good idea, especially for a developer so small (there were 35 people working there when i visited).

so, i'd say its very likely but its no where near announcement let alone release.