I use Orb
for my local media. It's easy, just add the folders to share and poof, it's available anywhere you have Internet. You can share and access anything, the PS3 detects it automatically, and I use it to stream music/videos to my PDA. You can access your local music, videos, pictures, and more anywhere there is an Internet connection. It's free.
I also use PlayOn
to stream Netflix watch instantly movies, Hulu, CBS, Youtube, ESPN and more to the PS3. It's not free but it is regularly updated and only $30 for a LIFETIME license. It's dead simple to set up, you can pretty much just install it and then go to your PS3 and it's automatically detected as well.
adds the ability to share local media then Orb
will be gone.