I have a book of extensive information about different stages of meditation and the four yogas of Mahamudra called "Mahamudra - The Quintessence of Mind and Meditation" by Takpo Tashi Namgyal. However I've no idea if it mentions the Jhanas. Its a really thick book with small print and no index at the back for some inexplicable reason !
Anyway - back to the sutta - I wonder if anyone else has any comments about it ?