Serious Eats - seriouseats.com

If vegetarians can call a veggie sandwich a 'veggie burger' then yes!

Yeah the bun thing made me want to comment... I do enjoy the standard issue too, but my housemate and I really love using fresh kaiser rolls from the local bakery. We select medium hardness, but even if it is a hard bun, we still enjoy them a lot! Kaiser is our 'fancy' burger bun of choice.

Also, was curious about a bun poll and noticed AHT just ran one. http://aht.seriouseats.com/archives/2009/10/aht-poll-whats-your-favorite-burger-bun.html

I treated myself to Portland's Slowburger at the Slow Bar on my birthday a couple months ago. While their Winter Slowburger didn't use fruit as it's main focus, you could sure taste the cherries they used in the relish. It was actually quite good. I think it was just the right amount as, say, cherries instead of a tomato or mixing it in with the meat would be too much for me. That said, I would probably try it.

A review of it can be seen at the Portland Hamburger blog