I believe the two licenses are compatible.
See:
http://www.gnu.org/philosophy/license-list.html#GPLCompatibleLicenses



On 11/16/05, Ber Kessels <ber@webschuur.com> wrote:
prototype is not GPL, it is MIT. we only allow GPL. I think this is a big problem.

Ber

On Tue, 15 Nov 2005 15:23:23 -0800
Colin Brumelle <colin@bryght.com> wrote:

> I've done some work with Prototype, and have found it to be really well
> thought out. I would love to see Drupal standardise on this package for
> adding AJAX functionality. Prototypes inclusion in Rails also offers some
> guarantees that it will be around for a while, developed further, and
> maintained.
>
> +1 from me...
>
> -------------------
> Colin Brumelle
> colin@bryght.com
> http://bryght.com
> http://mixedcontent.com
> Cell: 604.351.0547
> Office: 604.682.2889
> skype/jabber/aim: cbrumelle
>


--
            Bčr Kessels                          Drupal services
            bler.webschuur.com                   www.webschuur.com
            ber@jabber.webschuur.com



--
-------------------
Colin Brumelle
colin@bryght.com
http://bryght.com
http://mixedcontent.com
Cell: 604.351.0547
Office: 604.682.2889
skype/jabber/aim: cbrumelle