Seaside Testing Frameworks

I have been looking at testing frameworks and wondered if someone could 
help me in choosing one. I'm using Seaside 3.0.7 in Pharo 1.4 and have 
thusfar seen Seaside-Testing, WebTester (Selenium) and an approach using 
Soup + Zinc. I liked the look of Selenium as it allows for cross-browser 
testing and will probably be well supported. However I haven't been able 
to get it working and haven't seen anything mentioned about it since 
Pharo 1.1.1. If it isn't currently being maintained, would one of the 
other approaches be better?

Thanks,
Chris