You can't really view RAW photos, at least not with a standard web browser. It's sort of like asking someone to post a negative.
I think the closest thing that you could get would be for someone to post a RAW with a straight JPG conversion and then the same thing tweaked. Of course, that wouldn't be a fair comparison, since you can tweak the JPG. So probably the best comparison would be for someone to post a shot taken in RAW, converted to JPG using some basic defaults and then adjusted and the same shot carefully adjusted before converting to JPG.
To get a really good comparison, you'd want to see several different types of corrections - large white balance corrections, significant overexposure corrections, significant underexposure corrections, significant dynamic range compression, etc. You'd probably also want to have someone post these using a wide gamut color space like Adobe RGB even though most PC based browsers won't display them properly. The wider gamut will be visible when printing and problems associated with making adjustments to an 8-bit file (such as banding) will be more apparent with a wider gamut than with SRGB.