I've always used photobucket to post photos on the forum.
I've just opened a flickr account and, at the moment, I'm trying to get a handle on the different terminology (Photostream/Camera Roll ?).
I think I've worked out how to post images on the forum now(flickr BBCode = photoshop IMG code), but with flickr I appears that I have to delete part of the code or by default it attaches a link to my flickr account.
Other than that flickr does seem a lot slicker than photobucket, and at 1Tb it gives you a lot more space for your photos.
If I've got it right a photo should appear below without a link.