15. A computer readable hardware storage device containing computer executable instructions which when executed by a computer perform a method collaboratively commenting via a thin client application, comprising: receiving an image of the document at the thin client application; receiving one or more comments and information that associates each comment with a location in the document where the comment is anchored to the thin client application, the comments and information sent in an extensible markup language (XML) file, such that a selectable control representing the location of a comment is displayed at a location near the location of the anchor as a hypertext markup language (HTML) overlay over the image of the document and the one or more comments are displayed in a pane displayed proximate to the image of the document; in response to receiving a selection of the selectable control, displaying the one or more comments associated with the selectable control; and in response to receiving a selection of one of the one or more comments, displaying a portion of the document at the location of the anchor associated with the one of the one or more comments and providing an HTML overlay, over a portion of the image of the document, that highlights the anchor of the selected comment.
15. A computer readable hardware storage device containing computer executable instructions which when executed by a computer perform a method collaboratively commenting via a thin client application, comprising: receiving an image of the document at the thin client application; receiving one or more comments and information that associates each comment with a location in the document where the comment is anchored to the thin client application, the comments and information sent in an extensible markup language (XML) file, such that a selectable control representing the location of a comment is displayed at a location near the location of the anchor as a hypertext markup language (HTML) overlay over the image of the document and the one or more comments are displayed in a pane displayed proximate to the image of the document; in response to receiving a selection of the selectable control, displaying the one or more comments associated with the selectable control; and in response to receiving a selection of one of the one or more comments, displaying a portion of the document at the location of the anchor associated with the one of the one or more comments and providing an HTML overlay, over a portion of the image of the document, that highlights the anchor of the selected comment. 17. The computer readable storage device of claim 15 , further comprising providing an HTML pane displayed to a side of the image of the document, the pane displaying the one or more comments in the document.