Yes you can now datamine as an observer at Prima Tables (at least at bet365 where I tested it tonight)
You just need to download and install this SQL lite driver first..
http://www.ch-werner.de/sqliteodbc/sqliteodbc.exe
NB this is not the same as converting to DB to SQL, it just enables you to read the Prima hh off the hard drive...
Make sure Prima site option to write hh to your hard drive is selected
Fire up PT and click the Prima download option (configuring PT to point at the hh.dat file in the relevant Prima installations on your drive)
You can use GT+ as the HUD (I don't think PAHUD does Prima yet)
So now at Party skins and Prima you can mine with the basic PT, at UB you not only mine but go back 100 hh prior to when you start observing with GT+ and at Pacific you can mine with a $10 add-on...
Just remember YOU HAVE NO EXCUSE FOR SITTING DOWN COLD AT A TABLE AT THESE SITES EVER AGAIN!