Persistent connections: current implementations?

If anyone on this list knows about clients and/or servers which
currently support persistent connections, could you let me know?
Do they all use the "Connection: Keep-Alive" header to indicate
that a connection should be held open?

Do any clients or servers support the scheme where the server
transmits all the inline images immediately after transmitting
a document, even if the client doesn't ask?

Thank you very much.


Ping
kryee@wheat.uwaterloo.ca