3. For 3 I just use built in shell-mode, but what is really neat is saving your shell session to a file "C-x C-w" every so often. Then if you reboot or crash or whatever, emacs-desktop will bring back all your open files and all your shells. I usually have 3, regular bash, a sql session, and maybe an ssh session to somewhere, all with a full record of what I've done, sometimes going back months.
1.http://www.emacswiki.org/emacs/InteractivelyDoThings
2. http://www.emacswiki.org/emacs/DeskTop
3. For 3 I just use built in shell-mode, but what is really neat is saving your shell session to a file "C-x C-w" every so often. Then if you reboot or crash or whatever, emacs-desktop will bring back all your open files and all your shells. I usually have 3, regular bash, a sql session, and maybe an ssh session to somewhere, all with a full record of what I've done, sometimes going back months.