This is the only [shoplink 17922 ebay]GH1 + 12.5-75mm[/shoplink] lens I found on vimeo :)

We have still to wait a little bit before to get our GH2. To kill the time I searched for some exotic fast zoom lenses that we (and I) might could use on the GH2. There is one particular interesting lens I found on [shoplink 17922 ebay]eBay (Click here)[/shoplink]. The Cosmicar-Canon-Tokina 12.5-75mm f/1.8 C-mount lens! The focal lenght and constant fast aperture is very interesting and but sadly I found only one video taken with the GH1. The Karaoke part is terrible :)
A few pictures can be seen at Flickr. The japanese website geocities.jp tested the Canon version of the 12.5-75mm lens.

That lens is deifnitely not a professional solution but we have to wait a few months before Panaosnic releases the already announced fast wide and normal zooms!

Omuser.com posted a series of image samples at any focal length an aperture (Click here to read the google english translation). Image quality and build quality of the [shoplink 16261]Panasonic 100-300mm[/shoplink] are very good. The AF is quick and quiet. The only “issue” is that the lens is big and heavy. But damn that is a 200-600mm FF equivalent! And if you compare it to other lenses the Panasonic is really very small and very cheap:

The Panasonic 100-300mm lens is already in Stock in Europe at Amazon Deutschland, Amazon UK
In US you can only preorder the lens at Amazon US, Adorama, BHphoto.

You can also buy all new Panasonic lenses on eBay:
[shoplink 17556 ebay]Panasonic 14mm f/2.5 eBay acutions[/shoplink] [shoplink 17618 ebay]Panasonic 100-300mm f/4.0-5.6 eBay acutions[/shoplink] [shoplink 17620 ebay]Panasonic 3D 12.5mm f/12 eBay acutions[/shoplink]

Photographyblog heavily tested the [shoplink 15659]Olympus M.ZUIKO Digital ED 14-150mm f/4-5.6[/shoplink] lens.  The lens performance is verz good: “It has left us with a favourable overall impression.“…”you can safely use it wide open or stopped down by one f-stop“…”Chromatic aberrations can be a bit of an issue at longer focal lengths, but they can usually be dealt with in post processing.”

That lens is in Stock at Amazon (Click here) with a $120 discount.

There are also a few new tests with the Voigtländer:
Mike Kobal tested the Lensbaby Composer and [shoplink 15659]Voigtländer Nokton 25mm f/0.95[/shoplink] on the Panasonic GH1. And he also posted a Super Slow Motion test.
TheBlackStar posted a few image samples on Flickr and Dreesman at Dpreview forum.

If you want to buy the lens there is one single Voigtländer Nokton in [shoplink 15659]Stock on eBay (Click here)[/shoplink] sold via german resellers (UPDATE: Lens sold)

At Omuser.com you can see the [shoplink 17163]Olympus E-5[/shoplink] vs Nikon D3s shootout. You can see the image comparison on page 5 (Click here). The text is in chinese but that should not be a problem:

Look at the following samples:

ISO 200 (Click on image to enlarge)

Not bad at all! And consider the price difference …the Nikon costs $5100!

Digitalkamera.de posted a new Olzmpus E-5 review (Click here to read the google english translation). Also in that case the reviewers is enthusiast about the camera performance. The only complain is the high price.

Olympus E-5 direct shop links:
Amazon US, BHphoto, Adorama, Amazon Deutschland.