So in typical form, I am planning a grandiose WHS installation that will probably end up eating way too much time and money, but who cares 
I store all of my movies in .VOB format, then rename to .WMV format which I then stream to my xbox 360. This means that my files are quite large and I am looking to go to the WHS route as a storage medium so that adding drives is super simple for all of the family to use.
Here is my planned setup:
Gigabit network connecting 3 Xbox 360's for media players to servers
3u Micro BTX server, probably a core 2 duo with 2 GB of ram
3u Norco SATA 12 bay array with growing number of 500 GB Seagate HD's, 7200 rpm and 16mb cache
My real question is in the interface between the array and the server. There are two versions of this array, eSATA 4 port (with port multipliers) and 3 port Infiniband Multilane. I want the largest pipe between the server and the array possible. The infiniband is cheaper than the eSATA, so I would like to go that route, but I don't know much about the multilane technology, so I am a standstill deciding between the two. I think that I would probably end up making up the difference in price (and then some) by going with multilane because the controllers are more expensive, and I am concerned about this "port multiplier" business on the eSATA and bandwidth back to the MB.
If anybody is curious or wants to look at the specs, go to newegg and search on "norco 12 bay".
Could somebody give me a little direction on this? Which one is the way to go? What are diffenences in Multilane and eSATA?
Much thanks to anyone who sheds some light....
Danno