chipmark (4/6/2007)

+ open source => open api

+ supports categories and labels

+ rich drag&drop web interface for bookmarks management

+ firefox extension to manipulate bookmarks locally, like within the browser

+ html import/export with labels, add date, last visit date, last modified date, privacy, labels and description

+ nice bookmark add form in firefox extension (shows categories hierarchy and list of labels)

- need to refresh chipmarks in firefox extension menu after modifications on the website (changing a bookmark category)

- firefox extension is fast but lacks drag&drop support and sidebar

- sloooooow

- no bookmarklet

- no rss support provided

spurl (4/6/2007)

+ supports categories and labels

+ web sidebar in firefox + bookmarklet

- slow

- no longer supported (limited functionality, no new features...)

- html/xbel export is incomplete: lacks tags/labels, visibility (public/private), snip, language, explicit