Yes, there's going to be a Starship Troopers 3 and it will feature some cast from the original. Currently that means the lead from the first film, Johnny Rico, but there is talk of others returning too.

The news comes from various sources through Moviehole:

Ed Neumeier will return to the typewriter to punch out the script...Casper Van Dien mentioned via his official site that he is involved, reprising his role as Johnny Rico.

Says the actor, "The script is along the same line as the first. It is Awesome". He adds that Rico would now be a General in the film.

Oh I would love it if this was done as well and as cheesy as the first one, that is a great fun movie. However the chances are that it will probably make it straight to video. Who wouldn't love to see another Troopers?