What is the status on letting my PowerPoint text import while using Mountain Lion? It really isn't too much of a hassle to import the slides as jpeg's, that is unless you want to use Signals, which is one of the reasons when switched to Proclaim.
There should be a fix in the next release which will allow you to import PPT (though not PPTX) files while using Mountain Lion. I can't give you an exact ETA on the release, but we are hoping it will be soon.