From Engadget:

Hard drive Zunes

• It’s called the Zune 80 and, shockingly enough, it has 80GB of storage.
• Uses the new Zune Pad — four way touch-sensitive d-pad (with up, down, left, and right buttons).
• It will sell for $250 (with “premium” headphones).
• Available only in black (to start).
• Screen size has increased to 3.2-inches (from 3-inches). As far as we know the resolution is still QVGA.
• Dimensions are 61.1 x 108.2 x 12.9mm (2.4 x 4.25 x 0.5-inches), some 1/3rd smaller than the classic Zune.
• The classic Zune will now be known as the Zune 30 — it’s not going anywhere. More on that in a sec.

New flash Zunes

• Zune 8 and Zune 4 are the names for the 8 and 4GB flash based models.
• Also uses the Zune Pad.
• These will sell for $200 and $150 respectively.
• Both will be available in pink, green, black, and red.
• It will feature a 1.8-inch screen (compare to the nano’s 2-inch screen).
• Dimensions are 41.4 x 91.5 x 8.5mm (1.6 x 3.6 x 0.33-inches) — compare to the new iPod nano, at 69.8 x 52.3 x 6.5mm (2.75 x 2.0 x 0.26-inches).

Everything else

• New Zunes ship in November, date not yet announced.
• All Zunes (including the Zune 30) will have a new, redesigned interface and feature parity. In other words, early Zune 30 adopters will have all the same software features as new Zune 80, 8, and 4 users.
• Additional native video codecs for h.264 and MPEG-4 — users no longer need transcode those file types to WMV.
• Zune can FINALLY sync video from your Media Center PC! Jeez, took you friggin long enough, guys!
• WiFi sync to host computer! Includes moving over music, movies, photos, podcasts, etc.
• Podcast support! (Sorry, no over the air downloads — sync only.) Podcasts can also be shared via WiFi.
• The 3×3 song sharing DRM has had its three day restriction removed, but users can still only play files three times.
• There is still NO wireless music store.
• The Zune software is all new and rewritten, and is supposed to actually be more than a rebadge of WMP10 now. Friggin finally.
• The Zune music store is going DRM-free, with over 1m MP3 tracks being made available for download. Other details (like which labels, whether there is a DRM-free upgrade path is for users who’ve bought music with DRM, price differences, etc.) are not yet revealed.