I literally spent hours trying to find a way to hack a reblog (and
like button) for use in a theme; seeing that there was seemingly no
appropriate template tag to output the reblog URL. I was not
successful. As a last resort I tried using {ReblogURL}. Of course–it
worked, now if only you would include it in the docs!
Then to add a like button I assume I will just grab the value of
{ReblogURL} trim off the letters/numbers at the end of the URL
(seemingly no other way to get these numbers), and pass the URL
(
http://www.tumblr.com/like/{PostID}[string-from-reblog-url]) to the
like button iframe thing via javascript.
Anyway, please just add {ReblogURL} to the theme docs and save other
theme developers a few hours of frustration.