Not sure if this is just a rumor or not, but the folks at HEXUS.gaming are reporting that the PS3 will allow you to do video blogging:
The PS3’s free online service, called ‘Playstation World,’ will include a ‘blog-like’ function. Through the use of the Eye Toy camera, you’ll be able to record your own video blogs, which can then be shared through the online network.
You will also be able to view your friend’s photos and videos from the PS3, on your PSP.
If nothing else it shows that Sony is definitely hoping to expand the PS3 into areas other than just being a totally kick ass gaming system. No word on if these video blogs will be viewable by anyone outside of the Playstation World network.