http://www.brightcorner.com/ -- easy to read, professional and great attention to details
http://sinelogic.com/ -- great design co. and sales site
http://tadalist.com/ -- marketing site for a free to do list manager (that uses Ajax, btw, to edit the lists)
http://arrayexpress.net/ -- another marketing site for a MLM software ASP, clean and lots of good information
http://hicksdesign.co.uk/journal/ -- one of my fav designers and the creator of the Firefox and Thunderbird icons
http://www.stylegala.com/ -- Good general resource for Standards-based designs
http://www.adampolselli.com/ -- just plain perty and cool color forecasts
http://gaincms.com/screenshots -- nice interface comps on a future competitor
http://www.fiftyfoureleven.com/weblog -- design is OK, but the content is great ... ahem, a few links to interesting Ajax articles
http://sethgodin.typepad.com/ -- if we can crack into here, we're on to something! Great content on marketing in general from a modern-day marketing guru ... special nod to our own Brian Oberkirch
http://www.lightbox5.com/likeitmatters/ -- and in another nod to Brian ... great thoughts on marketing
What do the rest of ya like?