qmail is an Internet Mail Transfer Agent (MTA) for UNIX-like operating systems. It's a drop-in replacement for the Sendmail system provided with UNIX operating systems. qmail uses the Simple Mail Transfer Protocol (SMTP) to exchange messages with MTA's on other systems.
In addition to Ubuntu 6-months stable releases and the next version of ubuntu is 7.04 with Code Name "Feisty Fawn".
Curretly most of the people are trying to upgrade to ubuntu edgy eft (Current Stable) but they are having some problems related to xserver,applications,nvidia,ati drivers etc.if you want to know more common problems with their solutions check here i hope you will solve with this collection.
apt-show-versions parses the dpkg status file and the APT lists for the installed and available package versions and distribution and shows upgrade options within the specific distribution of the selected package.
Mono is an open-source project providing the necessary software to develop and run .NET client and server applications on Linux, Solaris, Mac OS X, Windows, and Unix. Monodevelop is probably the best IDE for developing .NET applications on Linux. In order to install and use it for development, you will also need the Mono .NET runtime environment installed.
If you want to Configure grub and usplash using Simple GUI Interface here is the tool called Startup Manager.This is a simple pyton script.