If you are using a tag "toRead" and when u want to archive your link u feel too lazy to edit your tags and remove it, u could check out this simple script that adds an "archive" button that does the dirty job for you."toRead" tag can be configured easily on the script source.
My script uses AJAX to call del.icio.us api, so u should also configure your username and password if u don't want to be prompted on every archive.
credits:
Del.icio.us delete item
Edit:as Arvid suggested, i have removed login and password.
This script does not work anymore, Delicious is gone :(.
