First up, there's a new display options menu tucked into the top right corner of your bookmarks display. This is for when you're viewing "My Bookmarks" - not on the main page. Here's what it looks like:

Delicious also gave the option menu treatement to the tags section on the right sidebar in "My Bookmarks."

Last but absolutely not least, there's a new option to "Browse these bookmarks." Again, this is for your own bookmarks. When you click it, you're taken to the most recent bookmark - but there's a toolbar frame across the top. Click arrows to browse through your bookmarks. This is very much like the new StumbleUpon - except your just browsing your own bookmarks. It will be interesting to see if Delicious expands this capability to truly compete with StumbleUpon in the future.

Look for the "Browse these boomarks" link in a blue box in the top right corner:

Here's one of my bookmarks with the Delicious browsing frame at the top (click to enlarge):

Connect with me on Delicious, screen name nlj.

Search Refinements - Previously, you could refine searches by time down to 1 day. Now, you can refine down to 5 minutes.

iPhone Optimization - Delicious has optimized m.delicious.com for iPhone users.

Graphs - URL details and the Tagometer badge (a widget for sites and blogs) are now getting visual representation of their data

Sharing - Who you've shared your bookmarks with will now show up under your tags for a bookmarked item.