I created tonight a 7-zip archive of a portable version of Sweet Home 3D that includes executables and bundled jres for Windows 16 bits/32 bits, Mac OS X, Linux 16 bits/32 bits (see the README.TXT file provided with the archive). Once this 7zip archive is uncompressed in a given folder, this folder can be moved anywhere, and all the additional imported data will work from a computer to an other.
As a special bonus, I included in the archive all the furniture contributed in page 3D models page (sorry if all of them are not translated), and the 22 available translations.

Hope you'll like it. [:)]

Please test it, and give me your feedback. I'll transfer it to SourceForge.net files if everything works correctly as it seems from my own tests.

Developer comments:
The Portable version of Sweet Home 3D 3.6 (116 MB) was released on 09/12/2012.