Although really - the jetting issues are pretty big with this process. The materials and print heads are tuned with much effort. You could get around the jetting issues by using one material and do the EnvisionTec process (i.e. DLP projecting on a bath of UV cured plastic) - but it'll be more expensive materials wise - though you will be able to print hundreds of things at one time...

For now the FDM (MakerBot / RepRap) process are the best start for accessible printing.

No, the process is fundamentally different. You can think of the RepRap process as being like a glue gun on a robot arm, whereas what PJet stuff does is more like printing a page of paper, but instead of ink, it's resin. Then shine some UV on it to cure it.