Hey Jason!

I have two. [These are getting to be like my moleskine in terms of addictive purchase habits...] I purchased mine from "Pendemonium" online. If you surf over to their store and hit "stationary" then "Miquelrius" you'll see the one I have. But the second one I bought at B&N in town. Oh wait... I remember finding a picture of them on flickr... let me pull one up for you: intriguing way to use a notebook as a planner.

I think that the smaller miquelrius flexible (very much like the larger ones in these pictures) would fit in the back-pocket, but it might be too thick to be comfortable. The loss of the rubber-band closure and the (in)famous back pocket of the Moleskines is a bit of a sad loss, but to be honest with you and me, I didn't use my beloved Moleskines as much as I would have liked to. In a queer twist of fate, I've now started using them as my laboratory notebooks for my work in the lab. :) I seem to like them for that purpose... the larger of course.

Hope this helps!

ps- for a very smooth experience with an FP, I highly recommend the correspondence sized Triomphe pads from Clairfontaine (also avail. at Pendemonium- I like 'em 'cause they treat me well- customer only)- they're really really smooth... don't forget to pick up a super-cheap pack of blotter paper ($1 for 4 sheets) they're excellent, and can be used until they're all your ink's color. ;) Mine hasn't survived that long yet. I find they're great to use as bookmarks for books you jot things down in with an FP, but might need to close really quickly... a quick blot, and close, and no ink transfer.