Devices playing FLAC

Indeed.

Also there's repeat modes (repeat-this-track and A/B repeating often use 
short enough spans to be entirely in RAM with Ogg) and users asking for 
short rewinds and so on.

All my CD music is stored in FLAC as its primary form (it lets me compact 
the huge CD pile down to a fairly small stack, which fits on a small hard 
drive these days), but is converted to Ogg for portable use. This turns a 
250Gb lump, far larger than any player, to a 25Gb lump which fits on even 
a small hard drive based player such as a 30Gb ipod.

I *really* don't want to have to play chop-and-change with my music 
collection, ever. The whole lot should be on the portable device.