as far as I know these features are being worked on. I know the external links will be in the offical release but aren't yet in the beta version. As to the other items I'm sure they are working on it.
I agree, those features would knock this software out of the park!
Can't wait for version 1.0 with external link support. I would also love to see linking to Photoshop & Illustrator.
I'm loving www.squarespace.com for websites. It's pretty powerful and
beautiful. You can see my ongoing project here: ambitdesign.squarespace.com
Now if I could just create flash to put into the site.