Thanks for the great work and great 7-zip software.
Is there a chance this software will become even better by implementing support for LZIP (decompression to start)?

LZIP (see http://www.nongnu.org/lzip/lzip.html) is on the rise. It is GPL open source as well, and offers greater compression ratios with at the same time better decompression speeds. I'm using it for backups of lvm logical volumes with the virt-backup.pl script.

Thanks in advance!