I know there have been threads with pony samples in them, but I'm unsure of how many and how complete they are. In this, I hope to be of a little help every now and then.
Below is the download link for a full collection of Trixie samples. Every single line from Trixie from the show, labelled as such.
http://www.mediafire.com/?3bt3f3v7o821dfa
I hope this helps somepony out there.