Your dmesg output shows the mouse has been detected and configured.  The
pms driver should support 3 buttons (but not a wheel-button).  (It looks
as if NetBSD must figure out which driver to use by probing the mouse---I
haven't looked at the code, but the GENERIC kernel config enables both the
3-button pms and the 2-button-plus-wheel-button pmsi.)

It sounds to me like everything is working normally.  Were you expecting
mouse-driven console-based cut-and-paste to be built into the kernel?  If
so, you may be in for a disappointment (but cut-and-paste works normally
under X).  There also is somewhere a GNU program, I have been told, which
supports cutting and pasting with the mouse under the console.

(If you just want cut-and-paste and don't need to do it with the mouse,
you can always use window(1), which ships with NetBSD, or GNU screen,
which is in pkgsrc.)


  ``I probably don't know what I'm talking about.'' --rauch@math.rice.edu