Konqueror plugin advice

[Robert Wittams]

Hello, 

I am interested in making a konqueror plugin for trustable distributed web 
commenting (a mouthful!). 

The comments will be distributed via the giFT daemon,  http://gift.sf.net, 
and thereby the openFT network. 

For an idea of what this is, have a look at http://crit.org. 
This system is centralized and not trustable, however. 
It uses a proxy style system.

My plan is the following:

every time konqueror goes to a url:
                  1)search on gift for comments relating to this. 
                  2)get gift to download the comments.
                  3)evaluate the trustworthiness of the comments (according   
                      to users trust settings). 
                  4)determine which part of the page they refer to
                  5)modify the display of the url to indicate comments
                  6)display the comments when the user indicates he would
                      like to see them.
                  7) allow the user to add his own comments. 
3 & 5 will be continuous, ie the user may modify trust settings to make 
comments appear and disappear. (similar to ratings on slashdot etc, but not 
centralized. ie you make your own trust tree to determine which comments 
are worth reading, from people you directly know/trust). This also entails 
some crypto.


Sorry if there are docs about how to do these things, I couldn't find them, 
and I would prefer not to do them in a broken way if possible.  

I need to know how to do the following: 
           get konq to do something on every url.
           do I/O with the gift daemon. Does this necessarily entail making 	 
              new IOSlave?  or is it possible to use normal socket            
              connections from a plugin? I guess it might be better to have  
              another daemon which does all the crypto/giFT interfacing to
               ensure  responsiveness.
           modify webpage display - I presume I need to make a plugin for     
               KHTML. Is it possible to directly modify the DOM tree, and     
              add different display elements too? Also would need the ability 
              to add different double click/right click behaviour for new     
              elements. 

Hopefully this is all doable within the existing plugin framework?

Rob