Flori: nope, 40 seconds is too long. However, you don't have to have entire turns to be in your showcase section
You can limit the parts you want shown to just parts of your turns so you can have more things added.
PiNK: Yeah, that's what I used too way back
It was the sole reason for me having wk, too.
Ray: while you're playing and something awesome happens, you press ctrl-F12 and Replayshark will create a copy of the replay of the game you're currently in. The filename will also have times in them; the time in the filename is 30 seconds *before* you pressed ctrl-F12 (the dir is User/Replayshark)
Koras: most of those 30 seconds are filled with walking towards your target though and therefore not very spectacular
There's no need to include the entire turn!
MonkeyIsland: what Ray said! (Jessica being Cueshark Jr.)