I mean, couldn't you do it with a program that takes an RSS feed, parses the abstract from each paper and puts ot through a run of the mill TTS engine?
Sure, I've done something similar to that in a few hours.
The free TTS options aren't great still, and "just the abstract" is not the problem. I did full articles, and the hard...er (it was a few hours) part was extracting out the relevant sections of full papers without the 'junk' info (page numbers, superscript citations, 7 pages of authors in any cern paper, etc.
