7-14mm lens test at CameraLabs. 8mm fisheye reviewed by Robin Wong. 30mm macro test by SLRgear.

The Olympus 7-14mm f/2.8 lens got reviewed by Gordon from CameraLabs:

The major benefit of the Olympus over the Panasonic is a brighter focal ratio: f2.8 vs f4. In my tests the Olympus also generally performed very well out-of-the-gates at f2.8 whereas the Panasonic often needed to be closed to f5.6 to deliver similarly sharp results. So in terms of aperture, the Olympus actually enjoys between one and two stops over the Panasonic if you want each lens to perform at its best.
The second benefit of the Olympus over the Panasonic is build quality. The Panasonic may be a premium lens optically, but feels quite plasticky. In contrast the Olympus is built like a tank with smoother rings and weather-sealing.

Robin Wong tested the new Olympus 8mm PRO lens and writes:

After spending two weekends shooting with this Olympus M.Zuiko 8mm F1.8 Fisheye PRO lens, unexpectedly, I have come to fall in love with it. Not because of the technical excellence, it is not the sharpest Olympus lens around, and surely not the fastest. The lens is just so fun to use, and it has forced me to change my shooting style, the way I approached my subjects, the way I considered my composition and the more thoughts I needed to put in before I clicked the shutter button. It is also the most challenging lens I have used so far, and that added in the fun factor.

The Panasonic 30mm macro lens got reviewed at SLRgear:

If you’re looking for a convenient and simple macro lens (that can do double-duty as a compact portrait lens) to throw in a bag without needing a tripod, the Panasonic 30mm ƒ/2.8 Macro is a good choice; its implementation of image stabilization will let you get down to 1/8th of a second. However, if you’re looking for a macro lens with more features suited to that kind of work, it’s hard to recommend this lens over the Olympus 60mm macro, which has a more useful macro distance as well as features that are specifically suited to macro work.

Panasonic Preorders:
Black G7 with 14-42mm lens at Amazon, Adorama, BHphoto and Panasonic. In EU at Jessops, WexUK.
Silver G7 with 14-42mm lens at Amazon, Adorama, BHphoto and Panasonic. In EU at Jessops, WexUK.
Black G7 with 14-140mm lens at Amazon, Adorama, BHphoto and Panasonic. In EU at Jessops, WexUK.

Olympus Preorders:
7-14mm f/2.8 PRO lens: Amazon, Adorama, BHphoto, GetOlympus, WexUK, AmazonUK, AmazonDE,
8mm f/1.8 PRO lens: Amazon, Adorama, BHphoto, GetOlympus, WexUK, AmazonUK, AmazonDE,
Titanium E-M5II: Amazon, Adorama, BHphoto, GetOlympus, WexUK.
Accessories:
7-14mm Olympus LC-79 Lens Cap at BHphoto.
Olympus PPO-EP02 Dome Port for 8mm at BHphoto.
Olympus PPZR-EP05 Focus Gear for 8mm at BHphoto.
Olympus POSR-EP10 UW Anti-Reflecting Ring for 8mm at BHphoto.