wheel - 10:08 pm on Mar 24, 2011 (gmt 0)
Been seeing references to mint as well. But probably the best route is ubuntu. It's the biggest disco out there, so lots going on.
In terms of flash and stuff, it may not come as part of the base distro if it's not open source or gpl. The distro I use has seperate repositories for all that stuff. And I subscribe to a paid version that I think gets me extra stuff like drivers.you have to install that stuff separately.