Eager to try out some of this advice, I went for a brief (3 m.) ride this afternoon, no orthotics, with the original insert that came with the shoe (the foam pad thing) and thicker socks than I've been wearing. No foot pain!!

I think I need to try 2 socks on one foot though, that shoe feels like I'm gonna slide out of it.

One thing I'm liking about riding clipless is that it's making me watch the road very, very carefully, because I still need some mental prep time to unclip.