It supports resizing of the parent, and you can change the font size of
the xterm with ctrl-rightclick and the size will adjust via
Tk_GeometryRequest (if possible).
Here's a screenshot of the xterm widget with some ttk widgets running
with Tk 8.5.2:
http://www.xmission.com/~georgeps/implementation/software/megapkg/Whimterm.png
It uses Tcl and Tk stubs.
You can download the 3rd revision here (with a BSD license):
http://www.xmission.com/~georgeps/implementation/software/megapkg/Whimterm-3.tar.bz2
To build it you will need to modify the Makefile for your system. No
autoconf goo yet, if ever.
The sources are in megapkg here:
http://megapkg.googlecode.com/svn/trunk/Whimterm/
svn checkout http://megapkg.googlecode.com/svn/trunk/Whimterm
This was inspired by a recent post requesting an xterm widget. I hope
this helps.
Example usage:
pack [xterm .xterm] -fill both -expand 1
George