Updating "Default Pool" via Portal

These are interesting techniques Patrik. I think the absolute simplest approach though is still an iControl. I'm not going to venture too far down the "which language is better for this" sort of thing, because it depends on what you're comfortable with. But if I was doing this, and I wanted to do it quickly, I'd probably build a Perl or Python script, or PHP-based webpage on some web server and use iControl REST. That would be very easy to incorporate into some third party portal product.