I'm currently using Lubuntu and planning to switch to other distro.
Here is my setup:
Browser = chromium (you could also try uzbl which is still in alpha)
Email = thunderbird (I would try mutt but I receive emails which are better read with images)
IM = pidgin + facebook chat plugin (don't know if the plugin works in finch)
WIFI = I don't know why I don't see any option to connect to wifi now (it worked before). I don't use wifi now so it's fine. Try searching for your machine if it has problems with wifi.

Originally Posted by
overdigested
I know most applications that run on Ubuntu can be drawn with X without having to launch GDM. But I'm not too sure how they work. Could someone explain the whole window management thing to me?
I'm not an expert but I think ubuntu-desktop automatically launch X so you don't have to type a command.
Grub = GNU GRand Unified Bootloader. This is what you see before you boot Ubuntu. It's not a command you use every often.
Top = I think it's a list of all processes
grep = it's like searching for patterns; more like regex.
Example: grep "UFW BLOCK" /var/log/messages
It lists all messages that have been blocked by ufw
Instead of reading man page first. You could try "grep --help"
Also, this just came out. It'll help you familiarize commands.
Ubuntu Tips Applet Fills Your Brain with Useful Command Line Knowledge