Did you find any answers to your question? I've searched the net some and various levels of talk on this but no definitive articles. My survey suggests the following but looks like I'll have to write test code to actually find the factual answers. I guess nobody has really answered this.
1. HTTPService is a Flex/Flash class commonly used in Flex. It works through the web browser (I guess this from what I have read).
2. IE6 limits to 2 connections to the server. "the server" is identified by domain name for IE. This can be generally configured with MaxConnectionsPerServer.
FF and IE8 are better. 8 and 6 simultaneous connections.
3. Some other issue with proxy servers and SSL causes the connections to not be held open across requests. I'll have to refind the note on this. May have to do with what HTTP headers we set. WebSphere and Spring by default set the wrong HTTP Headers for IE and SSL but both can be configured properly.
OK, so, this is where the knowledge gap exists: DOES FLASH USE THE BROWSER's sockets? Or does it use it own? Is it subject to the IE (HTTP 1.1) limits?
Thanks for any insights,
P.S> LCDS apparently does use its own sockets so avoids this historic design limitation.