It's about time, they're both 9 months late.The EU PlayStation blog @PlayStationEU have tweeted 3D Blu-ray support in firmware 1.75. Wasn't expecting this before 1.8 buy I guess they want to beat Microsoft to the punch.
There was a rumor that they wanted to come out with a big firmware update will all the media stuff. But it looks like they separated this one feature alone. I guess they're taking their time to do it right for the rest of media stuff (PS3 at launch was terrible, it was fixed much later). Still waiting for USB media playback, DLNA, and local MP3 in game music.
What's interesting is that they are using the team from Sony Vegas, it's a great software with a nice intuitive interface, and they obviously would have extensive experience with codecs on x86 and media playback interfaces. I'm optimistic they won't mess this up.