I use www.photobucket.com Its great as once the photos are uploaded, you just click on the url and it automatically copies, then you just paste on the thread. It also has an image code link that when clicked on auto copies then you paste it in the thread and the image or a smaller version is put onto your post, but the forum website doesnt actually host it, so there is no size limits.
eg
So that pic is being hosted by photobucket and not this website.
The actual link for it is http://i173.photobucket.com/albums/w45/sco_aus/0407002.jpg
Hope that helps.
PS, that R31 is for sale if anyone is interested