I guess del.icio.us isn't called del.icio.us since Yahoo! bought it, but whatevs.
Google Reader, which has been slowly dying for several years now, just got dismantled a little bit, when its "Share" feature went away in favor of Google+.
The good news is that it's extremely easy to export your shared items. There's the nice export page here: http://www.google.com/reader/settings?display=import.
There is also an Atom feed available from http://www.google.com/reader/shared/: click "Atom feed" on the right, then change "reading-list" at the end of the URL (it'll be preceded by a "%2F") to "broadcast?n=10000" (or substitute any suitably large number for n).
Someone wrote a procedure and (naturally) a Perl script for converting your Google Reader shared items to a bookmark file that things like del.icio.us can read.