Which small (7-10") displays have been confirmed to work with the Raspberry Pi?
Also, what should I consider when looking to buy one of these displays or trying to integrate one with my Raspberry Pi?
Apart from the usual DVI/HDMI and composite connector monitors it is possible to use the DSI connector to connect to a raw LCD screen.
At the moment there is no confirmed list of monitors I have found but it really depends on which distribution you intend to use, for instance I ran Debian Squeeze and it didn't recognise my BENQ G2222HDL 22" 1080p LED PC monitor correctly and used some messed up resolution like 1900 * 982 or whatever whilst XBMC detected it correctly straight away.
Anyway, there is more information on your screen options here: http://elinux.org/RPi_Screens
I've seen several accounts of people using extremely small LCD screens intended for automobiles via the DSI connector. Like EdChum, I haven't found a full list, though.
I hope you find more information. I'm looking for this as well.