I've not come across the Notes lockup you describe... I have run this on Windows 2000 Professional with R5.03/R5.05/R5.0.10/Notes 6.0/Notes 6.01. But I use Internet Explorer as my browser... have you tried that?
The reason I say WIO is a hack in the mail template is that in order to use it you have to click on the Action button. This looks at your location document to find your Sametime server. It then opens a Notes database on the Sametime server (we don't allow Notes access to our Sametime servers) and opens a form in that database. The WIO applet is embeded in that form and loads using the parameters supplied to populate the TO:, CC: and BCC: fields. This whole process performs so slowly that the whole thing becomes pointless. The Sametime-enabled templates are better because they load the applets right into the appropriate forms... but obviously this causes a hit on performance. And most of them are really only samples not production templates.
On the issue of the LiveNames applet only working if you have Editor access to a document I am surprised. I have not seen that behaviour here. Clearly giving everybody Editor access to any application would be pointless.
And about Notes 6.5 and COM I only meant that I believe that they are using the COM toolkit to provide Sametime integration directly into the Notes client and mail template rather than having to rely on the applet scenario I described above. If you look at the level of integration between Outlook and Sametime that has been created by Instant-tech (
http://www.instant-tech.com) you will see how embarassed Lotus should be at their poor showing int his area. The Instant-tech implementation is superior in every possible way and does not feel like some sort of clunky after-thought.