Julien Lavergne has released lubuntu 13.10. Lubuntu 13.10 is available here:
Lubuntu is a flavor of Ubuntu based on the Lightweight X11 Desktop Environment (LXDE), as its default GUI. The goal is to provide a very lightweight distribution, with all the advantages of the Ubuntu world (repositories, support, etc.). Lubuntu is targeted at "normal" PC and laptop users running on low-spec hardware. Such users may not know how to use command line tools, and in most cases they just don't have enough resources for all the bells and whistles of the "full-featured" mainstream distributions.
With many LXDE components, Lubuntu also uses well-known applications, such as Firefox, Openbox, Pidgin, to name a few. The Lubuntu project wiki contains more information on the project and the applications used available.
Based on the lightweight LXDE desktop environment.
Pcmanfm, a fast and lightweight files manager using gio/gvfs.
Openbox, the fast and extensible, default windows-manager of LXDE.
Lightdm, using the simple GTK greeter
Firefox, as the new choice for lubuntu 13.10
See the complete list of applications on https://help.ubuntu.com/community/Lubuntu/Setup#Applications
A Pentium II or Celeron system with 128 MB of RAM is probably a bottom-line configuration that may yield slow yet usable system with a reduced lubuntu desktop.
13.10 32 bit ISO require your CPU to have Physical Address Extensions, or PAE. "PAE is provided by Intel Pentium Pro and above CPUs, including all later Pentium-series processors (except most 400 MHz-bus versions of the Pentium M)."
If you have a pre-Pentium II CPU, start from the Ubuntu 12.04 mini.iso.
and please consider the tips in this link
If you have a Celeron M or Pentium M CPU without a PAE flag but with PAE
capability, use fake-PAE according to this link
For PowerPC, it is known to run on a G4 running at 867MHz with 640MB RAM.
For Intel based Macs, lubuntu should run on all models.
PPC has several issues and workarounds, please refer to the documentation on the wiki.
Guided install has a bug when selecting 'max' (1163908).
Upgrading slow machines Slow Machines
In partitioner 'select something else' deleting and adding a partition causes crash. (*** NOTE *** Alternate installer does not have this bug).
Lock Screen (lxlock) does not work by default: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1205384
Automatically started applications (such as Update Notifier) set in lxsession-edit do not work unless you do this trick: https://lists.ubuntu.com/archives/lubuntu-users/2013-September/005577.html
Blank boxes appear when hardinfo is started, and needed to be closed before accessing to the application (1029212)
Different spacing for the icons on the right corner of lxpanel (1056547)
Software sources takes 30 seconds to load (1073728)
Clicking on Ibus icon start the deamon, but doesn't display an icon (1041933)
Some actions on the menu may cause an harmless crash of menu-cache (1098732)
For common issues with Ubuntu, please refer to the Ubuntu release notes.
The release notes, with a list of known problems are available on https://wiki.ubuntu.com/SaucySalamander/ReleaseNotes/Lubuntu
You can find information on how to report a bug on this wiki page : https://wiki.ubuntu.com/Lubuntu/ReportingBugs
A big thanks to everyone involving in the development of this new great release: LXDE developers, Ubuntu developers, ISO testers, artwork and design people, social-network & blog writers, support & IRC keepers ... It's another success of a great team work.
Project wiki : https://wiki.ubuntu.com/Lubuntu
Documentation : https://help.ubuntu.com/community/Lubuntu/Documentation
LXDE website : http://lxde.org/