I know a couple of people have asked this in different threads but I haven't seen an authoritative reply on the matter - are these rare techs still in the game or were they removed?

I know that they were something that Brad had mentioned in a number of different interviews before release, but having played a few games I haven't come across any.  Of course, this doesn't mean much as they are (were?) meant to be rare and only show up very occassionally.

If the devs are unavailable for comment, have any other players actually seen these appearing in game?

Thanks,

Inscrutable