You made the bump, so there shouldn't be any news. By the way, I still expect someone to make an actually functional Thunderbolt Gun (not a multi-railgun in disguise). Definitely looking forward to this.
The problem is that using Railgun shots leaves the particle trails behind in third person cam, which looks gruesome and fake. We have FastProjectile to achieve a better, much more accurate recreation of the Thunderbolt. Oh, and the really hard part (which I think everyone chooses the easy-Rail way) is making it explode if used underwater, killing everyone submerged.