Update: It appears that I misread the Dolphin Blog the first go around - version 5 doesn't block in-browser ads, the in-app ads have been removed. I apologize for the misinformation.
The final version of Dolphin Browser HD 5 landed in the Android Market this morning, and it brings a whole slew of bug fixes and improvements along with it. Among the many improvements is one that most users will be quite happy about -
Dolphin HD now blocks all Google Ads within web pages without the need for an add-on, making your browsing much simpler, as well as using less bandwidth Dolphin HD is now ad-free! Previously, you had to pay $4.99 for a license to remove ads, but that's no longer the case.
Other major features include a new, elegant UI, an improved speed dial, and a much more organized bookmarks sidebar with subfolder integration.
Several popular add-ons have been updated, as well - including Alexa rank, Shiny Shake, Dolphin Read it Later, Read it Later, and Morning Coffee. All the bugs have been worked out, so the transition to the newest version should be completely painless.
The Dolphin Team also bumped up both the launch speed and browsing speed, so you'll spend less time waiting and more time browsing.
At the time of writing this, the Web Market listing for Dolphin HD hasn't been updated, so for now you'll have to make sure to grab it directly from your mobile.