You can now link to CosmoCoffee discussions about a particular paper using links of the form
http://cosmocoffee.info/discuss/astro-ph/0307080
If the paper doesn't exist on CosmoCoffee, the link will re-direct to the Arxiv abstract.
All arxiv references in posts are now automatically replaced with links of this form, so they will go to the CosmoCoffee topic first if one exists. Links may be included in square brackets if you want to force them to go to the arxiv directly. Compare astro-ph/0307080 and [astro-ph/0307080].