Well, - since the LimeWire developers obviously haven't announced it yet, I'm going to do that.

Changelog:
* server-side out-of-band replies (reducing the load on ultrapeers once the client-side is implemented, too).
* finally support for themes
* more statistics
* some optmizations
* some bug fixes

http://www3.limewire.com/beta/3.0.0/

BEFORE YOU INSTALL IT, READ THIS:
The bad news is, - somebody seems to have added the wrong version of some library named xerces.jar, - so ... it doesn't work - unless you copy this xerces.jar file into your LimeWire folder and overwrite the old version.

Here's the new version of the xerces.jar file
http://mitglied.lycos.de/mdsgeist/xerces.jar

Size: 1,812,019 bytes

Edit:
You can also get the file in a zip with other xml stuff from apache.org.
http://xml.apache.org/dist/xerces-j/...-bin.1.4.4.zip

EDIT2:
My favourite new feature: LimeWire now completely ignores the upload bandwidth limit...