Seems that StackExchange is, according to Lior Yaffe's wishes, to become the main discussion portal for Ardor. There's an Ardor Stackexchange in the making, until it's ready the Bitcoin Stackexchange should be used (where altcoins are allowed).

I was wondering if a trustless variant of Lightweight Contracts is possible. It would however, very likely, need a new type of Phased Transactions. If someone knows the answer, feel free to post there. If this works, then Lightweight Contracts could be used for similar use cases than Ethereum smart contracts.