You were a soak tester for the last update (as was I), but that may not mean we would be for the next test. My feeling is that you sign up for each one. I don't think 'once a soak tester always a soak tester'. But I am just guessing on that part. However, I would be shocked that they sent it out without a soak test and I would think you and I would have at least gotten an invitation to be soak testers again........this is all very odd. Also interesting how close this version number is to the store demo version which is 5.9.991. It isn't April 1st is it?
That's what I mean though, there was no communication about a soak test let alone a chance to sign up for it. And no buzz on the forums about one. Plus like you mention, it seems to be the "demo" firmware version. All this has me thinking that somewhere, someone screwed up and the "demo" firmware got pushed to some production phones.