I've been looking around for a soundtrack for Fire Emblem ~ Radiant Dawn (for the Nintendo Wii), but searches of retailers and databases turn up negative; can anyone positively confirm whether or not an official soundtrack was released for it?

Unfortunately no, there is no soundtrack for Fire Emblem Radiant Dawn, just rips that are around on the internet. It is a shame that Nintendo doesn't release soundtracks to more of their games, especially games like Fire Emblem, which have exceptionally good music.

I can has link to rip, please?

^lolz

I'd actually like the link to that rip as well...

Here you go:
http://www.feplanet.net/index.php?fep=music&id=10

This is a set of all the game's music ripped directly from the game disc, then converted to MP3's. Enjoy!

NICE. Good looking out, man!

Foxhound... you're a good man!