iSync is being phased out from OS X. In 10.7 Lion, it doesn't come with it pre-installed any more.
I have purchased an iSync plugin for my mobile phone. I am currently using iSync in Lion using a version downloaded from the Internet (in a previous version of this question that didn't work, but this has since been resolved, it was an installation glitch). So at the moment, everything is fine, but I'm not sure for how long this will work.
Will I still be able to sync contacts and calendars with my mobile phone (a Samsung B2100) once iSync won't work on OS X at all any more (presumably when Mountain Lion comes out in may)? Is there a product that will continue to work that can deal with iSync plugins?