Another Daily Photography Site
topleftpixel.com is another daily photography site with some absolutely fantistic work by a photographer in Toronto. Funnily enough a lot of the recent pictures feature snow :) A lot are also macro images, which look extremely cool. I wish I could have a clue how to get the detail he got in his bagel photo. Time to practice I guess!
There's three ways you can do a macro that fine - one is to use an extremely ($4-500) expensive macro lens, and the other is to take a 28mm lens and reverse it (you can get mounts to do this). You can also get closeup lenses - though I don't think you can get that close a magnification out of them.
It's not just the lense, but the lighting as well. I have some nice close up lenses that I've played around with (on film camera) but the lighting was pretty sucky for what I was doing. You need a good tripod as well (<makes note on list>).
The really, REALLY expensive macro lenses actually have a ring light that fits around them to light the subject.