http://www.madebysofa.com/ - Cappuccino logo at http://cappuccino.org
http://metalabdesign.com/ - splash page for http://280slides.com and http://280north.com
http://cocoagrove.com/ - 280 Slides logo and some of the graphical elements in 280 Slides
Seriously, though, the 280 North website looks great.
http://cappuccino.org/images/cappuccino-small.png
It loses any sense of what it is, unless you already know. The larger version on the site is quite pretty, but I'm just not sure it works great as a logo. Logos should still be very clear and recognizable even when degraded a lot (size, lack of colors, etc...).