I'd settle for a USB stick or an SDXC card (say up to 64 GB) instead of spinning platers. But still, just copying FLAC's to the car and listening to them in thier glory is sort of the holy grail for me. Been looking for a while and I still haven't found one.
But maybe someone saw something new at CES (or other show) this year. I can hope.
Not that I know of. Not with wav or flac anyway. There are some hu's which can be set to 'fake' gapless playback with a sound effect at the gaps (such as my pioneer), but I've always looked at it as a bit cheesy and don't use it.
I don't understand why these features aren't standard. Empeg/Rio had gapless playback (MP3) in 1999. Long out of production, but you can still find them used and I believe the v3 Alpha firmware supports Flac http://www.empeg.com/downloads.
My all-singing, all-dancing 2011 Kenwood with Satnav etc. can't do either of these.
The other great thing about the Empeg is it stays on for a preset time after you turn the ignition off, so it doesn't have to reboot when you start the engine of pop into a shop for 5 minutes.
Although I'm not using mine at the moment, it still tickles me to think my 2001 unit has an Ethernet port, runs Linux etc. It was very ahead of it's time - image how good their unit would be if they made one today.