Hi Jason,
I am the founder of Visual Website Optimizer. And to be fair I have been expecting Optimizely post on TechCrunch as soon as I learnt that it was a YC funded startup. To be honest it bites me to actually read it on TC especially when I emailed you thrice :) But anyway that is life. I guess special connections do matter!
As far as name is concerned, the company's name is Wingify (which isn't as dull as Visual Website Optimizer). The product name was chosen to differentiate it from Google Website Optimizer, as my tool makes creating tests super easy.
As far as differentiation is concerned, well we launched way earlier than Optimizely (so it is them whom you should be asking this question). Actual differentiation comes in the ease of use, while offering all enterprise level features. Here is a comparision table: http://visualwebsiteoptimizer.com/feature-list.php
As far as interesting story is concerned, well we're bootstrapped (2 people actually), launched two months ago, are profitable (more than just ramen) and have managed to bag customers like Microsoft, Rackspace, 99Designs, Aweber and Threadless. Here is a partial customer list http://visualwebsiteoptimizer.com/customers.php
The tool has helped numerous small businesses in increasing conversions and sales. Here are some case studies: http://visualwebsiteoptimizer.com/case-studies.php and if you must compare it with other tools, here are numerous (all non-asked) testimonials comparing VWO with other tools: http://visualwebsiteoptimizer.com/testimonials.php
I don't know how else to pitch you rather than just providing facts. Please let me know if you wish to do a story, I will be happy to provide you with more stats or make it into an interesting story.
-Paras Chopra
PS: Thanks for mentioning VWO at the end of the post, but I will still stand by saying that it was bit unfair on TC's part.