Techspansion has introduced AudialHub — an inexpensive Mac app designed to convert dozens of different audio formats (and even the audio tracks from video files) to AAC, MP3, WMA, WAV and Apple Lossless formats, with the standard metadata tags in most formats converted and passed on to the finished file.
Nearly every aspect of the decoding [...]

Monkey Tools has announced the Universal Binary version of Sound Grinder. In addition to Universal Binary support, running 100% native on both PPC and Intel microprocessors, version 3.0 includes several new features including:

“Droplets” for simple drag and drop conversion;
support for Quicktime® Components such as Flip4Mac Windows Media component; and
enhanced metadata editing.

Wave Arts has released Master Restoration Suite, a comprehensive set of restoration plug-ins for cleaning up tape, vinyl, and acoustic recordings. The tools are designed to give extremely high quality results with minimal tweaking, hence they sound great and are easy to use.
The MR Suite consists of 5 plug-ins:

Master Restoration - all-in-one plug-in
MR Noise - [...]

Minnetonka Audio Software is shipping AudioTools Batch Pro, a fully automated processing tool for audio assets.
Batch Pro is a flexible, easy to use, and powerful tool for editing, converting, transcoding, encoding, and applying plug-ins to sets of audio files in a batch mode. Users specify input files, configure a chain of processors, set parameters for [...]

Version 1.0 of Sonic Visualiser, an application for viewing and analysing the contents of music audio files, is now available.
Sonic Visualiser contains advanced waveform and spectrogram viewers, as well as editors for many sorts of audio annotations. Besides visualisation, it can make and play selections based on the locations of automatically detected features, seamlessly loop [...]

Sony Creative Software has announced an upgrade to their Sound Forge professional digital audio editing application to version 9.
Sound Forge 9 software contains a wide range of new features including multichannel audio support, which allows users to edit, process, and record multichannel audio files. Also new are workflow enhancements such as drag-and-drop editing between channels, [...]

Fervent Software has announced the immediate availability of Studio to Go! v2.0.
The Studio to Go! software series provides a complete introduction to the world of Linux Audio and features a integrated audio and compositional environment on a single bootable disk.
The 2.0 release includes many usability improvements, and provides the latest Linux Audio applications, including support [...]

Musikmesse: BIAS debuted Peak Pro 6 - a major new upgrade to the award-winning pro audio editing, processing, mastering and delivery software for Mac OS X with Universal compatibility for PPC and Intel-based Macs. Peak Pro 6 offers many new features, including an enhanced playlist featuring new cross-fade options, volume envelopes and more; new DSP [...]

Minnetonka Audio Software has introduced AudioTools Batch Pro, a fully automated processing tool for audio assets.
Batch Pro is a flexible, easy to use, and powerful tool for converting, transcoding, encoding, and applying plug-ins to sets of audio files in a batch mode. Users specify input files, configure a chain of processors, set parameters for each [...]

Faber Acoustical has announced the immediate availability of Electroacoustics Toolbox 1.1, a modularized, multi-channel multi-analyzer, offering real-time data acquisition and analysis of electrical, acoustical, and electroacoustic signals and systems.
A modularized, multi-channel multi-analyzer, and it runs on OS X.  Yes!
Version 1.1 includes two powerful new tools for spectral analysis, including a new octave and 1/3-octave spectrum [...]