Finally Microsoft has decided to help everyone of us to obtain an hotfix for a product in a quick manner: no more special requests or phone calls, now there's a single place where, simply by filling a web form, you can request the hotfix you want.
The link that makes the "miracle" is this:
https://support.microsoft.com/contactus2/emailcontact.aspx?scid=sw;en;1410&WS=hotfix
You will get a form mail in response, and in it will be a link to an http site you can download the fix from.
I've personally tested the service yesterday evening (I need a fix for a NAV client) and this morning the hotfix was ready on my mailbox. 
Thanks to Steve Patrick for the advice...