It's not recommended that you tell your ISP that it's a router, however. My specific ISP provides me with a static IP-address. Let me give you a tour of this devices setup features. Since my ISP doesn't use PPPoE, I did not test this functionality. However, PPPoE seems like a system devised by broadband providers to utilize bandwidth more efficiently in their central-office location.
Some people seem to love it, others seem to hate it.
I used the Windows-based firmware upgrade utility exclusively, and was unable to get the JAVA one to even work. Additionally, since the Java-based firmware upgrade is a new feature in the recent firmware, it isn't covered in the documentation at all. I checked the firmware on my new Linksys once I was up and running, and discovered that it was many months old. It is unfortunate that the firmware upgrade destroyed my settings, and required me to re-enter all of my data. It is additionally troublesome that there was no warning about the loss of my existing settings.