I got the latest Jango Fett and Tusken Rader pens for my boys for Christmas from Toys R Us for $5 each. The pens look fine and the minifigs with a a very casual inspection look like the real thing. However I don't think they are the real thing. THESE AREN'T LIKE THE KEYCHAIN MINFIGS. The plastic feels different and the legs are clearly one solid piece. They are also somewhat cheaper. Despite the pens being treatly fairly kindly, the arms pop off very easily. The hands also come out of the arms easier than a standard minifig.
On top of that, the "minifig" is fixed to the pen pretty well. I haven't tried to separate the fig from the pen, but I doubt that it be all that easy to do. It's not like removing the keychain from a keychain minifig.
My guess is that Lego gave some of their molds to the pen manufacturer to use. The pens seems to be mostly AOTC era, and the pen company is making something similar to a minifig, but also very inferior.
For $5 the pens were a fine stocking stuffer, and for a novelty pen hey seem to write fine. But if you want a Jango Fett, look elsewhere.
"He is a very shallow critic who cannot see an eternal rebel in the heart of a conservative." - G.K. Chesterton