I must say, I'm perplexed. While the prospect of developing open citation standards is intriguing, there's no reason why this couldn't be integrated into the Endnote platform, as well. EN currently offers far more functionality to users, especially when used in combination with the EN Firefox extension. I suspect those who disagree really aren't very familiar with the program, or have very distant memories of the earlier versions. I have looked at each public version of Zotero as it's been released, and can't find anything it does that Endnote doesn't do better. Of course, I understand that it's not free, but US$80 is really very little for the functionality - and adaptability - it offers.