Here We Go Again
Two lifts of my Happy Beaver vinyl toy design discovered in the same week! Fortunately, I've got some sharp-eyed friends...
The first one was a 'new' mascot for Delta Dental's website, ironically named awholenewanimal.com. I've placed them right next to each other for comparison:

It shows up in a big, brief pop-up ad on a page of the Seattle Times, and again if you click on the ad - this time, even bigger:

This page doesn't hang around long, either - but The Weecan was also featured on the standing home page, albeit much smaller. It's since disappeared, having been replaced by an apple.
At least this rip-off is a Photoshop trace-over... the second pickpocket couldn't even be bothered to put in that much work. This one appeared on the Howie Do It! program, turning up later on YouTube. Here's a frame grab from the clip, a Candid Camera-style fake-out, in the form of a bogus game show:
It's featured prominently on the banner, and in cropped form on the podium. I'm pretty sure I know exactly which photo was used for this, too:

They were in such a hurry, they grabbed a photo of the first color test rather than the finished toy.
So there you go - two examples of casual thievery in one week. If this isn't a good advertisment for registering your work with the Copyright Office, I don't know what is!
UPDATE (5/17): The tiny Weecan on the Delta Dental home page is gone, and the pop-up ad on the Seattle Times page seems to be gone, too. The pop-up on the wholenewanimal.com page is still there, though.
UPDATE (5/20): The Weecan icon on the home page appears and disappears (it's gone for the moment - now replaced with a toothbrush - maybe it's randomized with other photos), and the original Seattle Times pop-up and home page file folder artwork seem to be gone (though I believed that to be true earlier and they reappeared). At the moment, only a single peelback ad at The Spokesman-Review remains.
UPDATE (5/22): I've received a few emails informing me that all of the ads have been removed, and that the peelback ad is a fake page - but it will be taken down soon as well. Everything else is gone from my point of view, so that's encouraging! Thanks so much for everyone's help and support.
UPDATE (5/26): I've recieved a letter from DLA Piper, the company that handles Washington Dental's intellectual property issues. They feel that since I sell toys and Washington Dental provide dental services, and since the characters have 'clear differences in their appearances', that there is no market confusion between the two. The letter concludes by stating that Delta Dental intends to continue using the "Weecan" character.
May 17th, 2009 - 06:06
wow. gross. i hope you get these guys.
May 17th, 2009 - 06:10
The first Delta Dental pop-up doesn’t always appear on Firefox, but it’s still there if you use Safari as your browser.
May 17th, 2009 - 16:00
I can’t give you the frog. Yes it is a similar style but you aren’t the first or the last person to make a smiling antrhomorphic animal. Unless of course you designed the frog as well.
The beaver however is a clear rip.
May 17th, 2009 - 17:08
>>I can’t give you the frog. Yes it is a similar style, but you aren’t the first or the last person to make a smiling anthropomorphic animal.
Sure, but the proportions and structure of the design are identical. Even the angle of the artwork is the same – if you place them on top of one another in Photoshop, it’s a perfect fit.
May 17th, 2009 - 22:25
since when do frogs have ears like that, either?
May 18th, 2009 - 13:38
Another example why we need photoshop police. Blatant rip off in both cases. BOOO.
May 18th, 2009 - 19:14
here is another link with the frog looking character
May 18th, 2009 - 19:14
oops here it is:
http://www.spokesmanreview.com/advertising/peel_back_ads/wds/version_2_spokesman_may2/
May 18th, 2009 - 22:28
Oof! More ads! Urgh. Thanks for the tip-off, anyhow!
May 19th, 2009 - 04:12
Delta Dental Weecan still available for viewing via good ol’ Google cache: http://74.125.47.132/search?q=cache:M-4UbBvppTcJ:www.awholenewanimal.com/+a+whole+new+animal+dental&cd=2&hl=en&ct=clnk&gl=us&client=safari
May 19th, 2009 - 05:14
wow, i remember my sculpture teacher sculpted that character and he showed us as it was in progress. cool to see it as a finished toy.
August 9th, 2009 - 16:27
happy beaver sure does look a lot like stimpy
August 17th, 2009 - 21:22
Yeah, happy beaver looks like Stimpy to me, too
May 30th, 2012 - 22:24
The weecan is being retired!
Here’s an email I got from Delta Dental to my work
“We have fun and goofy costumes that we have used at Washington Dental Service as a mascot for several years but we are now retiring the “Weecan”. We would love to donate these costumes to a local group and wondered if you would be interested. “