A new major version of vty exists:

http://members.cox.net/stefanor/vty/dist/vty-2.0.tar.gz

darcs get --tag=rel-2.0 http://members.cox.net/stefanor/vty

Differences from 1.0:

* vty now uses a record type for attributes, instead of bitfields in
  an Int.  This is the reason for increasing the major version.

* vty now supports setting background colors.

* You can now explicitly specify 'default' colors (blending in with the
  terminal configuration).

* vty now supports five ANSI boolean attributes: reverse-video, bold,
  underline, half-bright, and blinking.  (1.0 only supported bold.)

* vty now supports Unicode characters on output, automatically setting
  and resetting UTF-8 mode (beware double width and combining characters!)

* vty now disables ISIG and IXOFF, allowing C-q, C-s, C-c, C-z, and C-\
  to be received as input.

* vty now properly handles cleanup, leaving the cursor at the bottom of
  the screen and erasing the last line.