license question and problems

[Muhammad Hussain Yusuf <muhammadyusuf@btinternet.com>]

Hi,
I have an ITP for a program (gdis, which is GPL) which requires another 
program (babel) whose license is a bit vague, at least to me.

I intend to create binary for babel from the babel source in a sub
directory of my package. 

I have e-mailed the authors of this program (babel) about my ITP 
and to clarify the license but so far have received no reply. (I also
politely asked about the possibility of placing it under the GPL.)

The license for babel is: 


This software is provided on an "as is" basis, and without warranty of
any  kind, including but not limited to any implied warranty of
merchantability  or fitness for a particular purpose.

In no event shall the authors or the University of Arizona be liable for 
any direct, indirect, incidental, special, or consequential damages
arising from use or distribution of this software. The University of Arizona
also shall not be liable for any claim against any user of this program by
any third party.

(That's it!)


My questions are:

1) Is the above license OK for Debian?
2) If so, is it OK to go ahead if I do not get a reply from the authors?
3) The new gdis  package also depends on the Debian povray package, which is in
non-free: I assume that my gdis package will therefore also have to go
in non-free?

Regards,
Hussain