Can I ask: assuming that Smalltalk and Seaside are the bee's knees, who are your customers? Who do you sell Seaside solutions to?
I'm not a Smalltalk developer; I ask this as someone who finds himself missing Objective-C's dynamism when programming C# or Java, so I'm sympathetic to the advantages of Smalltalk. But customers know .NET and Java. That's not a hard sell.
Personally I still have a seaside application, I sell the service so clients get a user account on the web application that I host myself.
I wouldn't attempt selling the application as something a client would continue developing on.
I'm not a Smalltalk developer; I ask this as someone who finds himself missing Objective-C's dynamism when programming C# or Java, so I'm sympathetic to the advantages of Smalltalk. But customers know .NET and Java. That's not a hard sell.