For all intents and purposes, it's here! I had a bit of trouble streaming Netflix about a week ago, but they are quietly working out the bugs. I have now watched four complete movies without interruption. One of the keys to using PlayOn is to set the quality to medium rather than automatic. Although a little grainy, the quality is certainly better than Tversity streaming AVI's or other web-based applications. I can only imagine it getting better, not worse. In the week since I have begun working with PlayOn, they have upgraded the Beta software at least eight times--each is an improvement.
They will have my $30!
BTW, in the DSM-520, just click OK to the "Protected Media Files" and the PlayOn Menu should show up.