I used to use Google Notebook and Google Reader. I saved many notes and tagged many articles. Google suddenly discontinued both. I am not going to invest any effort into learning/using any Google service without some assurance that it is going to be supported at least 5 years.
Yep and I used Google Bookmarks too, so that I could get to them from everywhere, but it was dreadful if you had more than a few tags (massive load of HTML loaded for each tag which made a huge tall page) and was clunky.
It's definitely a concern when using some of the more far flung google products that this can happen. My company is developing a similar product (though it's going to be going beyond what is here).
We intend to stay in operation for a very long time! It's a product we need ourselves and we pour our blood, sweat, and tears into it. We're in private beta currently and if you'd like to try you can contact me (info is in my profile)!
Same here. Notebook was a like a brain dump for me and it saved my bacon quite a few times while pinning research. In fact, when Pinterest came out, I couldn't help but not the similarities (except, of course, for the glaring differences) Notebook was like textual "pinning". It was interesting to go back and see lines of thought in mid progress.