Serious compacts posted a mirrorless size comparison (well done!). Images and text below are from Amin Sabet (please visit SeriousCompact to see the full article).
Above (left to right): Olympus mZD 14-42mm lens (kit zoom for Olympus Micro 4/3 cameras, shown collapsed), Sony NEX 18-55mm lens (kit zoom for Sony NEX cameras), Panasonic 14-45mm lens (kit zoom for Panasonic G1 and GF1), Panasonic 14-42mm lens (kit zoom for Panasonic G2 and G10), Samsung NX 18-55 (kit zoom for Samsung NX10)
Above (left to right): Sony NEX 16mm f/2.8, Samsung 30mm f/2, [shoplink 14796]Panasonic 20mm f/1.7[/shoplink].
Above (left to right): Olympus E-PL1 with Olympus mZD 14-42 (collapsed), Sony NEX5 with Sony 18-55, Panasonic GF1 with Panasonic 14-42 (Sorry, wrong kit lens pictured; should have been the 14-45, which is slightly smaller as shown in the first image in this post)
Above (left to right): [shoplink 14828]Panasonic GF1[/shoplink] with Panasonic 20mm f/1.7, [shoplink 14908]Sony NEX5[/shoplink] with Sony 16mm f/2.8, [shoplink 14832]Olympus E-PL1[/shoplink] with Panasonic 20mm f/1.7
Source: SeriousCompacts.com
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And I would like to know from our readers what they think about the folowing post from RiceHigh “If Size Really Matters, What’s the Meaning of Micro-4/3 Now?”
Just my two cent…The [shoplink 14908]Sony NEX-3(5)[/shoplink] surprised us all with their compact size, but they also had to sacrifice the usability. Anyway, I am sure Panasonic and Olympus will soon release even smaller cameras…
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More NEX vs MFT comparisons:
E-P1 vs [shoplink 14834]G2[/shoplink] vs Nex-5 (dc.yesky.com / google english translation)
Leica X1
vs [shoplink 14830]E-P2[/shoplink] vs NEX-5 Jpeg comparison test by Steve Huff
[shoplink 14908]Sony NEX-5[/shoplink]
, [shoplink 14898]Samsung NX10[/shoplink] and Panasonic’s Lumix G2 Shootout on
Popphoto
[shoplink 14908]Sony NEX-3[/shoplink] vs. Olympus E-PL1 vs.
Leica X1 at
Motimotion
[shoplink 14908]Sony NEX-5[/shoplink] vs [shoplink 14828]Panasonic GF1[/shoplink] (
DPreview forum)
and 
