This doesn't answer your question, but rather details some reasons why you might not want to do that.
Presentations are not like regular documents. When constructing a presentation, every
frame needs to be carefully constructed, and allowing automatic frame breaks somewhat implies that you might have copy & pasted from another document- the audience will pick up on this.
A few of guidelines that I like to adhere to:
- no more than 10 words per frame
- use (
PSTricks) pictures and images wherever possible
- schedule about 1 frame per 3-5 minutes (the longer the better)- your slides need to support your talk, not the other way round
Any time that I have broken these rules, I have found that the audience is lost- do they listen to me, or do they try and read the slides?