[1] How to get startup ideas http://paulgraham.com/startupideas.html
[2] By deep readers, I mean people who don't want to miss a single idea in the essay.
That said, looks like a nice idea. Not sure how much I like this particular solution yet. Thanks for posting.
[1] Example here: http://www.grantland.com/story/_/id/8486795/the-harden-dilem...
Good job on the bookmarklet, though I am not sure if anyone will actually use it :) I think it's one of those things where you think it's a good idea, but really it's not quote as big of a problem as it seems.
Think about adding this to http://userscripts.org/. Userscripts are handled via GreaseMonkey extension in Firefox and from what I know, natively by Chrome but I never checked.
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Side note: believe me or not, but I stopped using bookmarks toolbar in my Firefox a year ago or two; I store bookmarks with short memorable names and use kbd to launch them; CTRL-T/CTRL-L, type, ENTER. I abandoned having a toolbar since I was never able to keep visual order in it after constantly adding new items.