Bookmarks were the first "read-it-later"service. I think Marco has a good reason to be pissed that someone else keeps staking a claim to the concept of RIL as it exists today because they did a bookmark extension a few months before he introduced, what is essentially the MVP these days for something called a "read-it-later" service.
Both of these clowns should sit down and recognize Furl.net with its caching feature beat both of them by many years (2003) and it was probably not the first one.