If Squeak is to be accepted into the business community at large, I would say the website is way less imporant than the ability to slap down a grid, hook it up to a database, and do some sort of live interaction.
It's not really exciting--though it'd be nice to see Smalltalk principles applied--but it's fundamental.
I have a project right now I'd like to do in seaside, but it requires me to be able to read and display a table on the web, something easily done in other environments, but not in Squeak.
Just an opinion. I keep looking for places to use Squeak in a business context. Database connectivity and display is key.