Hmm agree with those who suspect motives behind the post. But then again, the Mezzo/Ori is a great bike, and ought to be celebrated
There are already a good few threads on the Mezzo, and a few on the Ori, if you search the forums. I've heavily commuted my Mezzo around London for a year and half and am well pleased with it. It has been fairly well promoted by a fair number of London bike shops, and you do see them around town a fair bit now. Picking up points up the thread, it does come in a hub gear variant, so chain slack not an issue, but I (and most) have gone for the 9 speed derailleur. A couple of months back, I swapped my rear hub for a capreo hub, to enable me to install the higher geared capreo cassette (as original set-up is marginally undergeared) and will post a 3 month in review sometime soonish.
The Ori-bike variants look rather fab - again, a search through the forums should provide you with details of a Belgian dealer importing them at around E1000 a throw, which is exceptional value for what is a very good bike (think hard-tailed Birdy and you won't be far off).
Here we go:
http://www.bikeforums.net/showthread.php?t=150627
http://www.bikeforums.net/showthread.php?t=238178
http://www.bikeforums.net/showthread.php?t=240472
http://www.bikeforums.net/showthread.php?t=181190
http://www.bikeforums.net/showthread.php?t=364265
http://www.bikeforums.net/showthread.php?t=359994
http://www.bikeforums.net/showthread.php?t=359969
http://www.bikeforums.net/showthread.php?t=343755