my husband's cell phone has a 6 mp camera. Mine has a 3. It takes pictures that are just as clear as the old digital camera I take to the parks with me. Even my old 1.5 mp phone took really great pictures. Esp in the sunlight. You can't tell the difference between those and a camera pic.
I say....take as many pictures as you want. Even if the pictures aren't professional quality, they're gonna capture your memories..and that's the important thing.
I love to look at pictures. Not everyone is going to take picture-perfect-pictures. In fact, with some editing, you may be able to increase the quality, so that you would feel comfortable posting them.
Some of the photos that I took with my cell phone on my last Disneyland vacation, were actually quite clear.
I say take as many as you have time for. Even if you don't post them on MiceChat, you will have them for yourself, and they will bring back happy memories.
Everyone loves to see pictures of D-land, even if they are a little pixelated. My cell takes some what decent pictures even @ night cuz it has flash. I'm with the others post them anyway, we want to see.