Not a SuSE user, so my answers are based on general knowledge rather than specific information. But..
1) I don't think they would have an effective way (besides formatting or shredding) of preventing you from booting the machine after 60 days (or that they'd really like to do that). So my answer is: yes, you can boot the machine after the period, but you probably can't get the updates anymore ([EDIT] the commercial updates; surely you can access the community updates that don't cost you anything). Not sure how they identify you, but the upgrade program checks something to see if you're entitled to access the update server's content, and after the trial period refuses your access. Could be that there is some proprietary software installed that would stop functioning after the period, but I doubt that..the base system works after the period, only the "paid" parts won't. Like technical support and updates.
OpenSuse is SuSE that's supported by the non-paid SuSE community, SLED is supported by a commercial group. Like RHEL compared to Fedora. Community version has updates and possible support from the community, enterprise version has paid tech support staff and possibly updates made by people who are paid to do just that, and probably proprietary software that's not in the community version. Very probably both community and enterprise versions share a part of updates, it's the extra that makes the difference.
Last edited by b0uncer; 08-29-2007 at 04:00 PM.