Vbulletin 4.0 seems to be right around the corner. Even with it right around the corner however, I don't plan to upgrade to vbulletin 4.0 until most of these mods have been upgraded to be 4.0 compatable.

vBulletin 3.8.4

Affiliation 4.0 Show all of your affiliate(s).

Ain - Advanced Google AdSense 7.0 advanced system to show adsense on forums

Automatic Thread Tagger 1.2.0 Extracts keywords from thread titles and uses these as thread tags.

Cyb - Advanced Permissions Based on Post Count 4.4 Cyb - Advanced Permissions Based on Post Count

Insert Copyright 1.0.0 Insert Copyright Text Into Post

KX - Spider Permissions 1.0.0 This allows spiders to be placed in a special usergroup or select the features you want them to use.

Limit Links In Signature 0.5.5 This hack allows to set a maximal number of allowed links in signatures for each user group.

Limited Guest Viewing 2.0.1 Limit guests to view a set number of threads before being locked out.

MARCO1 H1 Tags 2.0 Add H1 Tags on your threads/forum display

Members who have Visited 3.8.002 Display members who have visited the forum.

Sorky03 - SubForum List Control - V1.8.0 1.8.0 Allows extensive control of how SubForums lists are displayed (vBulletin 3.8.x)

Spider Display 2.0.0 Show the spiders browsing your board in the What's Going On box of your Forum Home Page.

Usergroup Color Bar 2.0.0 http://www.tvpano.com/

Username HTML Markup 2.0

vBSEO :: Sitemap Generator 2.5 Generate a Google & Yahoo Sitemap for your Forums

Welcome Thread 1.2.2 Creates a welcome thread when a new user registers

YABBSEO[vB] v1.1 YABBSEO[vB]

The vBulletin team plans to release the vBulletin 4.0 Forums and vBulletin 4.0 Publishing Suite Gold Release on or before Monday, December 21, 2009.
Starting on the date of the Gold release, vBulletin 4.0 Forums and Publishing Suite will become officially supported products. This means that vBulletin 4.0 will be eligible for both ticket support and phone support.
As we work toward the Gold release, our goal is to get the best possible product into the hands of our customers. To do this, we’ve made huge investments in development resources and have been maintaining an extremely rigorous scrub schedule, identifying and fixing bugs at an unprecedented rate.
Since the release of the first vBulletin 4.0 public beta in mid-November, we’ve already released four additional public beta versions of vBulletin 4.0, including the latest release – vBulletin 4.0 Release Candidate 4 – last night. Additionally, we plan to provide an accelerated post-release maintenance schedule in January that will provide additional updates.
Please keep an eye on your e-mailbox over the next week for official word on the availability of vBulletin 4.0 Gold. We’re extremely excited about this huge milestone in vBulletin history, and thank you for your continued support along the way.
--The vBulletin Team