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Since there were many different issues asking for Digg like behaviour for link module and I honestly fully understand the wish to have that options at hand (since it is obviuos from the name of the module), but being much aware of all the con's on that (because I already build a Digg like site with Drupal and link module modified), and since this is actually rather more a custom field module for content type building than a linking system module, I think we should collect all the askings and discussion about that in one issue.
There are many things to discuss and it all flooded the issue queue. Especailly I am not sure about if this is more a content type rather than a option /addition to link module we talk about here. Let's face some pro's and con's here, and if this should be inbuild link or be provided by an additional module. I also would like to ask some "old hands" of drupal masters to join the discussion since there also some security and performance points with it in here.
I start this new issue and would like to ask you all to collect/provide your Digg (or similar) depending whishes for 6.x and 7.x with details and how-to's here. Describe exactly what you would like to have in and how you would start to do it. Any snippets and patches should be made after discussions. Please don't start with a patch and ask for implementation until it has been discussed to keep a better overview. I will post links in here from all issues I close now to lead them here.