Both
URBSite and
West Side Action covered the renovations to the entrance to the Delta Ottawa City Centre hotel (previously the Crowne Plaza hotel and originally the Skyline), on September 5 and 7, respectively.
WSA also has a post from February showing renderings of the new entrance displayed in the lobby. [Sep 2013: updated WSA links, both originals were broken]
Well, I've taken a few photos of the hotel over the years myself, and a couple days after the other two did, I went down to get my own shots of the renovations. I tried to get some angles that weren't covered in the other blogs, like this one of the hotel reflected in the glass of Constitution Square:

You can sorta make it out in that picture, but it's much clearer in this crop of a photo from August: the door on the 24th floor coming out the side of the building, which Eric refers to in one of his above-referenced WSA posts. As he mentions, it was used to access the inside of a former illuminated sign on the side of the building, in order to replace the bulbs without having to hoist a crane.