Hi, I am in a similar situation, however I couldn't even get my 360 to see my 323. What I did was install fun_plug and Twonky and it seems to work a lot better (so far). Pretty sad that I'll need to spend $30 to get this to work reliably, but if it does actually work and work well, it's worth it.
FYI there might be some weirdness with JBOD. I went from a RAID 1 setup to 2 independent drives and behaviour changed. RAID 1 went smoothly while with 2 drives, depending on the media I choose (pic, vid, music) the 360 will either see one or both drives in the 323. It's weird, but as long as it's consistent I can deal since I'm only using one drive for live data while the other is for backups.