It has been awhile since the last announcement of an official release of Puppy Linux, 6.0.3 "Tahrpup", starting with 6.0 in October 2014:
http://bkhome.org/news/?viewDetailed=00097

Mick Amadio, the coordinator for Puppy built from Slackware 14.1 binary packages, has brought Puppy to a new release, version 6.3. This is distinct from Puppy 6.0.x, which is built from Ubuntu Trusty Tahr binary packages, coordinated by Phil Broughton. Mick coordinated Puppy 5.7.x which is also built with Slackware packages.
For the first time, Puppy is released in both 32-bit and 64-bit versions.

The announcement and release notes for the 32-bit release is here:
http://distro.ibiblio.org/puppylinux/puppy-slacko-6.3.0/32/release-Slacko-6.3.0.htm

Announcement for the 64-bit release:
http://distro.ibiblio.org/puppylinux/puppy-slacko-6.3.0/64/release-Slacko64-6.3.0.htm

Download:
32-bit: http://distro.ibiblio.org/puppylinux/puppy-slacko-6.3.0/32/
64-bit: http://distro.ibiblio.org/puppylinux/puppy-slacko-6.3.0/64/

Fast mirror:
http://ftp.nluug.nl/os/Linux/distr/puppylinux/puppy-slacko-6.3.0/

Forum thread for general feedback and discussion:
http://murga-linux.com/puppy/viewtopic.php?t=101425
Forum thread for bug reports:
http://murga-linux.com/puppy/viewtopic.php?t=101663