I just picked one up last week, other than the plastic body and lack of micro-adjust I like it. At it's price point I'm not disappointed at all and in fact quite pleased. It's debatable whether the micro-sdjust is needed. I tried the Canon 24-105 L and the 100 macro and they were right on the money. I also tried a Sigma 50mm f/1.4 and it wasn't even close, sent it back for another copy. I have a 100 L macro
due in this afternoon, will post here only if it is not right on the money, meaning I would benefit from micro-adjust. The plasic body seems rugged enough. I was willing to spend for a 7d but passed since it doesn't have manual adjust audio input (are you listening Canon??) plus the articulated hi-res LCD is very desirable for me.
I know if I were Canon, especially with everything going on in Japan right now, I'd definitely get into the firmware upgrade business...i.e. offer additional features via firmware for a price. I'd shell out $99 extra for micro-focus adjust or maybe the 3x video crop/zoom thingy from the T3i on a 60d as downloadable firmware upgrades. I bet a lot of 7d owners would pay $99 for adjustable audio inputs. Given the lack of overhead its pure profit for them and might be a very attrictive revenue stream until things settle down in Japan.