Yeap, I’m still using Quicksilver. And yeap, I’m still in love with it.
And mixed with Delicious … it gets even better.
Note: There’s a note on the Delicious plugin page;
Plugin not compatible with Intel based Macs yet (does this mean “does not work with Intel Macs”, or that it’s not “universal”?)
It’s worked before on an Intel Leopard machine, as well working currently on the Snow Leopard one, so don’t worry about that.
The Goods
Bookmark your pages, just like you would, but just remember to rename the titles for those pages. Little did I know, the plugin only uses the title of the page, not the tags.

You’ll notice that there are three “WebFaction Control Panels”, even though they all go to a different page. So I went ahead and named those something more useful for each page.
Also, I decided to lead the human-readable titles with something shorter to type. For example, I have it so that wfa goes to WebFaction’s Apps page.

One caveat: After you’ve done all your messing around in Delicious, don’t forget to go into your Quicksilver preferences and refresh the Delicious catalog.

Bonus: Bookmarking Via Quicksilver
Quicksilver uses the bookmarks you have locally, in bookmarks folder and your bookmarks tab.
If you already have the Delicious bookmarklet “installed”, then you already can invoke the Quicksilver action for creating a bookmark by typing out “Bookmark”.

But who has time to type out “bookmark”? Time to go make it yours.
By The Way
My delicious page is at http://delicious.com/joshkim.
I struggled to get Delicious working with B56A7, with Snow Leopard. I use the Social Bookmarks plugin. Sometimes it’ll load my bookmarks, other times it wont. Each time I put my mac to sleep it forgets the bookmarks. Sometimes a manual refresh will work..
How come your catalog entry says Delicious rather than Social Bookmarks?
I actually have no idea why the catalog entry is Delicious. I actually did a fresh install of Snow Leopard, and mine says “Delicious” also. Must have been some remnant code.
As for the plugin itself not working: I’m not too sure why it won’t work, but Quicksilver is definitely showing its age with each version. They’re currently working on a rewrite with Alchemy, so here’s to hoping a lot of these weird issues get fixed.