Remoting is not dead with Indigo. However if you want to prepare for Indigo (from the FAQ) you should “Avoid or abstract using low-level extensibility such as .NET Remoting sinks and channels.” More information on Remoting w/ Indigo can also be found here.

If you haven’t guessed it already, im one of the testers covering remote objects in the next milestone.

Curious about security and Indigo? You should check out John’s page - he’s the Security test lead.