Regarding closed source: Look at the roadmap.
Regarding size: I wanted to do it hassle-free to make it easy for new users, so both, the NXT core and the jre are included. Once my release cycle slows down, I'll offer client-only downloads (without core and jre).
Marcus thanx for your effort.
I just upgraded to NRS 0.6 and deleted the 1.6 solaris files.
Is your 1.6 running with 0.6 already?
Can you be as fast as JL is?

Can't keep up with JL. :-)
Simply delete what's in the nxt subfolder and extract the updated nxt core version there. Or simply don't use the NRS version that comes with Solaris by choosing "Connect to fixed URL" in Solaris.
I'll prolly release an updated version later today.