[Catalyst] Serve blob files into src="" type tags

[apv]

I've been searching around and reading a bunch of code but I can't find 
an "already complete" way to serve images (and other media like flash, 
aacs, mp4s and such) from a database.

Is there something obvious I've missed? Or is someone who has solved 
this willing to kick down with code? I think I can do it but I'd rather 
not fumble with it if someone's already done it well.

Thanks!
-Ashley