I'm quite interested in this idea, and consider myself competent when it comes to actionscript, although I am still learning. (does the learning ever stop?)
I live in Sydney, and have recently been working on a top down shooter, similar to what you are talking about.
I first started an isometric game, but the need to draw 8 different animations for each of the angles you would see of the characters for every different action they could do changed my mind, hence the switch to top down.
(learning the actionscript was more important than cool isometric graphics)
But if i'm not doing the graphics, that wouldn't be a problem.
I started learning on VB in highschool, but be warned, flash if far more prone to lag than VB, so highly complex AI can be a problem, although this may just be caused by my less than simple methods. (as I said, still learning)
But yeah, i was planning to make an isometric RPG as my next actionscript attempt anyway, so this game is a fortituous prospect.
Here's the game I've been making as my actionscript learning adventure. still VERY unfinished, but also pretty playable:
http://www.lazy-nati../ProjectValidus.html
And yeah, iv'e also recently been reading 'the fatal shore' by robert hughes, about the birthing of australia as a nation, which is highly relevant.
On a side note, I did a two year course on digital animation (mostly 3D), which doesn't really matter if you're doing the graphics, but it lets you know I am capable of learning :)
I have tons of spare time, but one question remains: How much is my time worth to you?
So yeah, if you like my game (so far), and think my AS skills are up to what you have in mind, chrispington@lazy-nation.com , or just reply here. I would like to know more.
thx