I just received my DNxIO. After following the intall procedure, I conducted a very unscientific test to transcode an AMA'd clip into Avid's 1:1 10 bit. Subjectively, the transcode seemed to progress exceptionally quickly. i was pleasantly surprised. However, whe the transcode was completed, the clip was shown as "offline" despite the fact that I could play it back from the Avid MediaFile/MXF/1/file folder. After shutting MC 8.4.2 down and restarting, the file appeared as normal in the Bin. This would appear to be a bug.
edit: another post has identified this problem as resulting from writing to a drive formatted in a non-conventional way, like ex-FAT or HFS+ on a PC.
As a side note, after registering the hardware with Avid, it now appears in the AAM as "Artist", with a license expiration date one year from today. Does this imply that there will be an annual renewal of the DNxIO license; and a fee over and above the MC renewal fee?