The deb (x86_64) files available from the LibreOffice web site work smoothly to install version 126.96.36.199 on Debian Squeeze, and doubtless on all other Debian-based systems. The instructions in the readme are very clear. Of course this is also useful for Wheezy, which ships with the same LO 3.5 as in squeeze-backports. There have been great improvements in speed and MS Office compatibility, so I’d say it’s worth it.
Incidentally, here’s how to change the default template in LO 4.