Bookmarking with Ubiquity - automatic tags

I had written about a YAHOO pipe that uses a service to generate tag automatically a few days back. I am now using the service to automatically generate tags for the ubiquity command I was working on.
The pipes is configured to spit out JSON output and all I do is iterate through it the tags and place them in the POST I make to delicious. The tags are space delimited. The biggest advantage of adding automatic tags is its ability to make the bookmarked sites easy to search. I am also looking for services that can index only my delicious pages and search through them. I was looking to make an A9 search xml and add it to my search box to help me recollect resources I have seen. This is infact, a "better-privacy" approach over what infoaxe provides.