This best thing about cappuccino's tableview is that it can be use everywhere... For example reimplementing tweetie's tweet list (more on that in a week or so). It doesn't traditionally look like a table, but it is.

It's incredibly flexibly and is used ALL OVER apps in Cocoa. Cappuccino has an amazing tableview, I don't think that can be said for other desktop class browser app frameworks.

SlickGrid is excellent.

I didn't like how coupled everything seemed (model, Pagination, etc) [as of 6 months ago, so it may have changed]. I ended up rolling my own remote model, editors, and pagination stuff, but it ended working like a dream. By far the best tableview I've used in a project.

Cappuccino's widgets UI is gorgeous though.