Cutting,copying and pasting in various different editing environments:

(an ever changing guide)

Vim
well, I would go into visual mode (hit v) and then use the cursor to select your chunk o' text. Hit x to cut it and p to paste it back. (you could use y instead of x to just copy the text)
(x)emacs
C-spacebar select the region C-w to cut, M-w to copy, C-y to yank back (aka paste).
this is an example of a complete emacs vi disjunction
gpm
left mouse button select text region, middle mouse button paste. (no real cutting available)
microsoft products for quite some time
control-x cuts, control-c copies, and control-v pastes... correct me if I am wrong.