I don't think there is any confusion from your side, opacitydesign.
What macromedia DOES mean is that with a near-future-release of ColdFusion (probably version MX) the capabilities of Database driven pages will be much greater.
Nonetheless, the same old story will apply to Flash MX as to Flash 5 with all three major server-side "pairs": PHP/MySQL, ASP/SQL and CGI/Perl.
The most simple validation rule is still the liking and the knowledge. If you handle ASP and Access databses or SQL easier than Perl or PHP, then just go for it! This obviously applies to all designers and programmers like me, who are anywhere in between the "more than a hobby" and "not yet a king of the road"...