A new version of "What to do after installing Ubuntu? Run this script!" has been released. The script now has an actual name: "Ubuntu 10.04 Start".
The main purpose of this script is to speed up configuring Ubuntu 10.04 immediately after you've just installed it. This includes both installing popular applications and codecs as well as fixing some annoyances in Ubuntu 10.04.
The script comes with a GUI (Zenity) and it can install: The GIMP, Pidgin, WINE, Chromium browser, Gnome Do, Guake, VLC media player, Mplayer, SMplayer, Thunderbird, Dropbox, Codecs (multimedia, java, flash), additional archives support, DVD support and fonts, Ubuntu Tweak, Deluge Torrent, CompizConfig Settings Manager, Development tools (from build-essential to Subversion, GIT and so on).
Tweaks: Move window buttons to the right (Karmic style), change Update Manager behavior to the one in Jaunty, remove mounted drive icons from desktop, disable the GDM login sound, enable the icons in menus and buttons, disable the GDM login user list, remove the ubuntu-docs package (frees up 252MB), change Gnome Calendar first day of the week from Sunday to Monday, downloads, installs and configure sharp fonts, fix 'apt-get update' delay for Google repository, automatically mount NTFS drives on startup and more, all in a few seconds.