Some simple questions about nxt so I don't have to look them up:

1) Is transparent forging really implemented? I thought not

The part that allows you to predict the next block is, you should be able to confirm this yourself using the tool above. TF is several interlocking bits so you can't really pick a point and say "that's when TF began". And not all of it is implemented yet.

2) Is https://bitbucket.org/JeanLucPicard/nxt the latest source code? if not, where do I find it? do I really have to decompile Java?

I believe so. Every version ships with the source code in the 'src' folder so you could use that for the latest version. Not sure it is in as usable format though

3) If account A transfers some amount to account B (which was already verified) at block N, can B use that stake to forge block N+1? if not, when will it become part of B's effective balance?

You have to wait for N+1440 blocks before it counts in B's effective balance again. You can't broadcast a transaction, move the Nxt, broadcast again in the next block in a new account, move, broadcast move etc. using the same NXT.

4) Is re-leasing possible? if A leases to B, can B re-lease to C without approval from A?

No

5) which is the best place to ask these questions? nxtforums? which section?

Nxtforum is best.

Technical general questions: https://nxtforum.org/general/
Transparent Forging: https://nxtforum.org/transparent-forging/


Thanks!

You're welcome. Keep it up!