Not sure this thread should be in this sub-forum but.....
If you want a strong third party (or many of them), than you should be pushing for the Alternative Vote (AKA Instant-runoff voting).
For the House of Representatives, a Single Transferable Vote system could be implemented.
With the current system and campaign finance laws, there isn't going to be new political parties who can win elections.
Sorry, haven't sorted out the sub-forums yet. =)
Why do you think we need the Alternative Vote? As far as I know it's not really wide spread, and most countries with multi-party system use simple plurality voting...
And I truly believe that if want change the existing system, we can do that - we just need to be persistent enough. Sort of, that's the core of our democracy. =)