URL to List Teams Sites a User has access to?

Hi, I am an IT Architect and we are looking for a method for providing users quick access to the various Team Sites that they might have access to.  We provide a Common IE folder across all machines where we put URL links to Workgroup and Enterprise applications.  This is relatively a short list of web based applications that are common to a medium to large group of people.  For example, Service Desk Link, Finance Link, Intranet Link, Document Management Link, HR Link. 

A request has now come in to add a specific Team Site link to this list.  Since there are multiple Team Sites, with varied from 5 - 100 users per Team Site, adding a link for 2800 computers to a given Team Site that only 20 people need is not realistic.  What would be interesting is a URL that would take the user to a list of Team Sites they have access to.  This would then be beneficial to everyone who is a member of a Team Site without adding and removing links to specific Team Sites.

Is there a URL or something that can be crafted that would accomplish this within our SharePoint site?