Yep, MDK 2 HD is in the works, but it's being released exclusively via Beamdog, apparently some new sort of digital service like Steam. So wonder how well it will do.
As for the games, yer they're good. MDK 1 was one of the top 10 greatest underdogs on PS1, being one of those rated highly but never really sold. It's not very long, but it's still good fun, probably something for the laptop! I never got round to completing 2, but waiting to see what happens with this HD version....