Download midtalk's source code via arch
Install baz (Canonical discontinued it but you can find it in most distributions).
Type :
baz register-archive http://arch.duckcorp.org/happypeng/midtalk/
and then
baz get nicolas.centa@free.fr--2006-midtalk/midtalk--main--0.1
You should now have the code.
A public SVN server should be available very soon for your convenience.