vassillios, I too would love a better way to integrate my Mac with my PS3. I use nullriver's connect360 with my xbox 360 which works wonderfully with videos and music. They have a similar program for the PS3 which seems to work quite well. I demoed it for the 30 minutes they allow you and found it to be generally fine, but since moving into our new apartment, I located my Airport Extreme up near the tv so when I want I can connect my external hard drive directly into my PS3, since I don't keep much media on my macbook hard drive these days. That was a really long response to a question you maybe don't even care about anymore. but for what it's worth, either directly connecting an external drive works great, and I am sure that mediashare will do great for you if you decide to go that route. let me know how you like it.
http://www.nullriver.com/products/medialink
