If I was a high priced copyright lawyer I wouldn't be here posting this, but here is my understanding,
It all depends upon the purpose/intent of the photo. Think of a news station. If a terrorist group was on the eiffel tower at night, every news camera (including news photographers) would be aimed at the eiffel tower. The intent of the photos is not the tower itself but the fact that their are terrorists in the tower. A person taking a photo of this could even publish his/her photo on the cover of TIME magazine with no worry of copyright infringement. A person could use this photo for the DVD box cover for their documentary of the eiffel tower terrorists.
Now, if hollywood came out with a sci-fi movie about aliens which had no relation to the eiffel tower terrorists, and used the photo, then, they could be sued.
If you have a review site about motorola cell phones, feel free to use as many photos of their phone as possible, as long as you don't use the photos in an ad campaign to promote your new vacation business. In the vacation business photo someone might assume your associated with motorola somehow. Motorola could sue you to remove their image so people don't get that misconception.
A good example would be the documentory about the guy who ate McDonalds for a month. He had hundreds of images of McDonalds and their famous arches in his movie. The reason he could do this is because in no way, shape, or form would someone think that he was associated with McDonalds.
Same applies to your situation. If you look at the photo on your website and you believe that a reasonable person would believe that you are associated with the company, then yes, they can sue you.
Another classic example would be seeing cans of coke, label blatently showing, in a pepsi commercial (and vice versa). They can legally do this because nobody is going to make the mistake that pepsi is associated with coke, even though cokes trade is clearly visible.
Taking a picture of a city street lined with businesses follows the same rules. If the purpose of the photo is 119th street, and your focus is not on one particular sign, then yes you can legally take the picture and post it anywhere you want. Your picture is not of a particular business but the street.
This is why news channels run the cameras constantly, their purpose/intent of their video is to broadcast news. Nobody is going to be watching the news and confuses them with a burger king.
An exception is people. A person can sue you for using their image without their permission, unless that person is a public figure, such as an elected official or movie star. A person that openly puts themselves in the public view becomes public themselves. This is why politicians and movie stars are hunted by the papparazzi all the time, because they can. Same rules apply to people who videotape themselves and send it into americas funniest home videos or a person that sits in a live studio audience. You can't place yourself knowingly in front of cameras and then sue someone becuase they used your image.
Still, many gray areas exist, so if you aren't sure, get a lawyer.