Having a problem wrapping your mind around or searching through your del.icio.us links? The deliGoo service has you covered.
They will combine del.icio.us and Google search to create a search engine for your del.icio.us bookmarks.
After you install the Firefox extension you can add the button to your toolbar and get started. From there you can type in the user and/or tag you wish to search through and then the search term you are looking for.
DeliGoo really is a delicious search tool, in more ways than one.