Agony Column has an excellent interview archive
A video interview of Kim Stanley Robinson on Fast Forward
Paul Di Filippo interviewed on Small World
Ben Bova discusses near future spaceflight on American Antigravity
Octavia Butler interviewed on Dragon Page Cover to Cover and NPR
Wired for Books interviews Isaac Asimov
Listen to Douglas Adams on Shockwave
IT Conversations interviews Eileen Gunn
Three short interviews with Arthur C Clarke on the BBC
Hour 25 has a good interview archive