David's looking, as ever, for more data points, should you have suffered the same fate. Either comment on his blog post or comment here instead.
From the posting:
"For reasons that are still unknown to me, the Ovi Store app (v2.08) on my C7, suddenly would not load. It was stuck at the blue and green loading screen, continually playing the spinning icon animation.....
...This might sound unlikely, but a pre-requisite of installing Nokia Reader is to install a .sis file for the Ovi Notifications Support Package. Having installed that .sis file, without bothering with the Nokia Reader application (I’m becoming very shy of Beta Labs apps, despite their appeal), I rebooted the C7 and tried the Ovi Store. To my delight, it started up as normal."