Those guys @ Edimax were kind enough to run a test for me, using BitTorrent using two lines. The router performed flawlessly and maxed out both the connections at the same time.

No special softwares were needed on the PC to bind them together (obviously). The router automatically does everything. How the load balancing works can be customized using a set of rules, based on port, IP, etc, etc.

So far everything looks great, and I'm surely buying this soon.