What OS are you currently using? I'm currently considering adding some features to Mercury which I could take advantage of some APIs that only exist in Mac OS X 10.3 (I can do a lot of it with some extra work but if most everyone is using 10.3 then I may branch the code base and add new Sametime features to both branches, while some new UI features will only be added to the 10.3 targeted version). Well now its up to you all to weigh in and let me know what you think.