For the Geraldine Weiss thing, I wrote it about it somewhere else under my investment philosophy, but the website is iqtrends.com. You can see an old sample issue at the website. And no, I do not subscribe; I only use her theories to start researching ideas.
The approach is this: People look at P/Es of companies and say "That P/E is low relative to the company's history." She started looking at dividend yields about thrity or so years ago and said companies tend to be in a dividend range. So, for example, Citigroup (I own and am negative after two years) has had a historic dividend range between 2.2% and 1.0%. When C has a yield of 2.2% or greater, it is considered a safe investment historically because, as someone said before, institutions will start buying because of the great yield. With yield of C now at 4% and increasing the divi each year, the question becomes "How low can it go with such a big dividend cushion?" Same question on the other end is Nucor (I did own and sold for a profit). In a year, when steel stocks were it, NUE went from Undervalued to Overvalued, according to its yield. Once you hit Overvalued, it could still run, BUT unless the company raises the dividend to put the yield back in Nucor's historic yield range, one would want to sell or put in stop-losses to let the market take you out.
And in terms of newsletters, I believe it has been #1 in the last 10 and 15 years for risk-adjusted returns. It will not find the next growth stock; I have used it to design a buy-and-hold (to a degree) portfolio but get a "safe" dividend with minimal risk to the downside.
I hope this made sense.