You can get a data dump from your reputation at: http://tex.stackexchange.com/reputation
The ninja search options are listed under http://tex.stackexchange.com/search which also appears on an empty search text. It's not really hidden, but I just found it recently.
Not a secret page but useful to know: If the mouse pointer is placed above the post date, i.e. the "answered x unit ago", the full date and time is displayed.