X11amp v1?? Nov 97 -> ?? ??? 97
X11amp v2?? ??? 97 -> 17 Jan 98 (missing)
X11amp v317 Jan 98 -> 27 Oct 98
X11amp v427 Oct 98 -> 05 Mar 99
X11amp v505 Mar 99 -> 10 Jun 99
XMMS v1 10 Jun 99 -> 17 Mar 00