Kevin gave Notable (http://www.notableapp.com) a great review on his blog here: http://iloveusability.com/usability-review/notable/ He sent in this video testimonial to us a little while ago.

Notable is the easiest way to give feedback on website design (visual, code, and copyright portions of the page). You can click on an FF3 plugin toolbar button to capture a page or use the iPhone app. Notable uploads the capture to your account where you can annotate the visual, code, and copy portions of the page capture and share the feedback with you team mates. Feel free to email us and ask more questions: support@notableapp.com (less info)