Hello! I got the 23/2 today and wrote my first impressions of it on my blog, along with some general focal length musing preamble:
http://blog.andyf.me/fuji-23mm-f2-first-impressions/
In summary: it's a really nice size and weight, aperture feels good to use, focuses quickly and quietly, and the images it produces are nice – tack sharp everywhere but the extreme edges, unobtrusive bokeh, no distortion, and good flare resistance.