Last night I gave a talk about full-text search in PostgreSQL.
Here are the slides, which are not of much use by themselves but you can check out the speaker notes which I puffed up a bit just now.
Update 2016-04-27: Slides updated following my talk last night at the PostgreSQL User Group in Nantes
If you have any questions or remarks or insults you can hit me up in the comments or on twitter.
I sincerely hope I will do another one soon, it was actually really fun to do! I just have to find a subject now. :-)
By the way, this has been a big help for me, you should definitely check it out, it cannot hurt.