For me there is always an "overlap" problem with "infotools" like todo lists, issue trackers, wikis, google notebook etc. And in my case, they're always competi

For me there is always an "overlap" problem with "infotools" like todo lists, issue trackers, wikis, google notebook etc. And in my case, they're always competing with email, which is hard to beat. Suppose I have an idea for a neat new feature for my product. What do I do? Write an email to the others, or put it on my todo list, or on a shared todo list, or create a feature request on the issue tracker, or write it in a wiki, or write it in google notebook, or just write it in todo.txt...? In the end, I use email for most things and google notebook for personal notes. I also carry Moleskine for when I'm not in front of the computer. Since you asked about collaboration, I think an ideal tool would somehow integrate with email (gmail), because clearly email is not going away for another x years. Also, I think the quick descent of Wave into also-ran status shows that "fancy" collaboration sounds good, but even if the initial reactions are super-favorable (I used GW for weeks and even wrote a blog post about it), email prevails! Hence my suggestion to integrate with email.