Oh hell, I've got a dozen folders of bookmarks in my bookmark bar, and each of those holds anywhere from 2-10 sub-folders, and inside those are the actual bookmarks. I'm too lazy to count all that, but I'd be pretty close in saying 100-120 bookmarks in all.
i must have at least 100 bookmarks, but i only really use what i have in the bookmark bar. i do like having all my bookmarks, however, as it auto completes the address as i start to type in the address bar, especially for sites not in my recent history.