TTBlue development, downloads, and issue tracking are all managed @ the TTBlue GoogleCode Site.
From that site you can also find links to the TTBlue Google groups for the mailing-list or forums.
Doxygen-generated documentation is available here.
TTBlue is licensed as open source software under the terms of the GNU LPGL.
This site is generously hosted by BEK.
TTBlue has received generous support from Electrotap, who provided the initial impetus for the project.