DCM - do you have a link for DigitalRev?
If you haven't already googled it - http://www.digitalrev.com/
Holy moly - they have some nasty, nasty reviews on resellerratings.com
I luckily was able to grab one from another user in the US on a buy and sell board this morning. Reading the reviews of paperwork, extra fees and just in general hassle with receiving a package from Hong Kong - I am very relieved.
I understand the concerns and had seen the mixed reviews so I was prepared.
I purchased two things from them, no problems so far. The first was a small purchase (<$40) a few months earlier to see how they would do. The second was the lens. Both arrived fine - new items, unopened, in original factory packaging and are working fine so far. I accept that support may be an issue, but I haven't had issues with my other Canon equipment.
Receiving the package from Hong Kong is no big deal. It was packaged very well and shipped FedEx - easy to track. The experience is similar to online Apple purchases I make that are shipped directly from China.
My only hassle was that one credit card company wouldn't deal with them since they were outside US and refused to accept the charge. Another card sailed through just fine. I use separate cards for online purchases so I can easily track them, no issues there yet.