CLUNKCLUNK  It's ugly, it's not nearly as feature rich as the Windows version, but at least it's much more functional than previous versions. I can do a successful backup, install and delete files from my ONE. It's still clunky, the interface feels like it was done by a junior college dropout, but at least it works somewhat.  
(Version 2.2.1.26)

CLUNKCLUNK  Works perfectly for 95% of disk images and is so much more convenient than Apple's built in utility. The only time I have issue is when I use password protected DMG files. Flashmount just launches and doesn't display any errors or information, yet won't mount the image.  
(Version 1.5.2)

CLUNKCLUNK  @Media Freak

You can place an alias of the folder that contains your movies in to ~/Movies and Front Row (1 or 2) can traverse that with no problems.  
(Version 2.6.3)