Thank you James for your consideration of this important security issue. There definitely is technical merit in using SSL to avoid plaintext transmissions within the Nxt network, particularly with certain Nxt applications.
Marcus03, You are correct that NXTmixer and NXTcash work trustless. However, as I mentioned earlier the mere fact that a Nxt transaction succeeds does not equate to guaranteed security of network participants. SSL represents the middle road of network security. It is not wide open for anyone to inspect, record, analyze patterns like the plaintext (HTTP) transmissions method of communication is.
The danger lies in the patterns that can be inferred from the mere fact that data has been transmitted. Originating and destination IPs can be identified and if HTTP is used every transaction can be identified too.
Implementing SSL into the Nxt ecosystem provides an important margin of security for network participants.
If infrastructure committee pays for half, I will authorized NXTcommunityfund to pay for the other half of the SSL cost. Maybe it is more of marketing thing, but I think there is also technical merit to avoid plaintext transmissions, especially for NXTmixer and NXTcash usage.
Why? Do NXTmixer and NXTcash not work trustless?