The developer preview release of Mozilla's next generation Thunderbird email client is now available for testing.

According to Mozilla Thunderbird 2 Beta 1 Release Notes, new features in this build:

• Message Tags
• Visual Theme
• Session History Navigation
• Folder Views
• Improved Support For Extensions
• Improved Offline Management
• Folder Summary Popups
• Saved Search Folder Performance
• Find As You Type
• Improved Filing Tools
• Updates to the extension system
• New Windows installer
• Mac OS X Universal Binaries

(BTW, Mozilla.org typed "MacOS X Univesal Binaries", I believe it is just a typo.) The point is... I don't think "Universal Binary" is a new feature, in June this year, Thunderbird 1.5.0.4 was released in Universal Binary.

Mozilla Thunderbird 2 Beta 1 requires:

• Mac OS X 10.2.x and later
  Macintosh computer with an Intel x86 or PowerPC G3, G4, or G5 processor
  128 MB RAM (Recommended: 256 MB RAM or greater)
  200 MB hard drive space
• Linux kernel - 2.2.14 with the following libraries or packages minimums:
  glibc 2.3.2, gtk+2.0, XFree86-3.3.6, fontconfig (also known as xft), libstdc++5
  Intel Pentium II or AMD K6-III+ 233 MHz CPU (Recommended: 500MHz or greater)
  64 MB RAM (Recommended: 128 MB RAM or greater)
  52 MB hard drive space
• Windows 98 or later (Windows XP recommended)
  Pentium 233 MHz (Recommended: Pentium 500MHz or greater)
  64 MB RAM (Recommended: 128 MB RAM or greater)
  52 MB hard drive space

Download links:
Thunderbird 2 Beta 1 (Mac OS X)
Thunderbird 2 Beta 1 (Linux)
Thunderbird 2 Beta 1 (Windows)

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