I was able to build a 64 bit version of the new Gambas 3 development environment on Ubuntu 10.10 i86_64.
I ran a half dozen examples (DB/SQL, OpenGL, Qt4, Gtk, ...) and everything seems to work as it did on the 32 bit version I have been working with.
I have been thinking about doing a Gambas 3 project here on the All Basic Blog showing some of the highlights of the language.