Aspects

Considered distributions

Xubuntu

Top 33 on distrowatch

used in 2007 to 2010

Ubuntu

Top 1 on distrowatch

used from 2010

LinuxMint

LinuxMint: Top 3 on distrowatch
LinuxMint website
For installation check ReleaseNotes

pro: Codecs preinstalled
con: LinuxMint has connecting problems with package servers. This is an absolute nono for limited presence in internet caf├ęs.

more detailed information: Comparison Ubuntu 10.4 and LinuxMint 9

a Kiosk Distribution

searchengine: kiosk Linux distribution

Puppy Linux

Puppy Linux

Damn Small Linux

Damn Small Linux Live-CD for ressourcenschwache Rechner

Desktop Light Linux

Desktop Light Linux

Vector Linux

Vector Linux Vergleichbar mit Desktop Light Linux

MuLinux

muLinux

Ubuntulite

ubuntulite orientates on Lubuntu

More Ideas

IntallCDCustomization and LiveCDCustomizationFromScratch