This could get me to switch to Seesmic, and maybe even learn to program, too.

I see twitter client after twitter client that reproduces the majority of the functionality of its competitors, but each with one unique difference.

It'd be great to not have to always be checking out new clients and deciding if the utility of its unique feature is worth the effort of using another app.

Although it sounds fancy, this reminds me the 90s. Sorry.

How does this remind you of the 90's?

(I'm involved in Seesmic, as both a disclosure but also a "direct to the source" opportunity!).

Programmable e-mail clients e.g. Eudora.

Of course most of the Internet users today, weren't users in the 90s, so this doesn't mean you wont find users to appreciate what you are offering.

The idea is not to expect end users to program their client.

The idea is to allow 3rd party developers to build scripts/plugins/etc that users can download and change their twitter client experience.

Think less Eudora and more Firefox plugins.

Ideas are personal. I just said I am not impressed. Maybe I will in the future when I see what others have built.

Does seesmic has any Business Model, I guess yes, but I just can't figure it out. Does someone understand how they plan to make money? (advertising, selling the client with premium features?....)

soooo Seesmic got a lot of money from Microsoft to port their next version to windows first using silverlight.