Office SharePoint Server include a "My Links" feature to keep track of the team sites you belong to and lets you book mark other SharePoint sites in the farm easily.
But what if you want to add a non-SharePoint site to your My Links. Try adding this shortcut to your IE favourites
javascript:function%20addlink(){t=document.title;u=escape(location.href);var%20q='http://ianmorr-moss/_vti_bin/portalapi.aspx?cmd=PinToMyPage&ListViewURL='+u+'&ListTitle='+t+'&ReturnUrl='+u;location.href=q;};%20addlink();
Replace ianmorr-moss with your portal host. Now, when you click the "Add to My Links favourite, you will be redirected to this page with the link information pre populated.
The nice thing about this is that after you click OK or Cancel, you will be returned to the page you bookmarked.
(It is easier to edit the properties of an existing favourite in the IE Links folder and paste in this javascript function)