Namaste all,
interesting thread and discussion thus far.
my views are predicated on my understanding, shallow as it is, of the Buddha Dharma and my particular Vehicle upon which i ride.
ATF is correct, Buddhism does not have a teaching of Prana, per se, to be found in the Hinyana or Mahayana. however, the Varjayana has something which, in some sense, could be considered in the same vein.
within the Buddhist Tantric system, there is a thing called the "subtle psychic body" which, for all intents and purposes, is the same as the Sanatana Dharma understanding of Prana. however, the real difference between these two understandings is the nature of Prana or the psychic body, as it were, and its' function.
within the context of the Tantric tradition of the Vajrayana, the subtle psychic body corresponds to the channels and winds which consciousness is interdependent on. (sorry... don't really know how to express this properly!) i mean to be saying that consciousness rides the drops and channels in dependence upon them. they "interare" with each other.
this subject does get, as you may suspect, fairly esoteric fairly quickly
essentially, the idea is that the male/female energies are, for most beings, not integrated with each other, they operate at cross purposes. the subtle body is the medium by which we can, through training and practice, direct the male/female principles to develop our spiritual capacity more quickly than we could through non-tantric means.
if there is interest, i can, perhaps, go into some more depth on what i've said thus far or elaborate further along some ideas.
as for the role of puja in Buddhist practice, the short answer is "it depends"
unlike many traditions, Buddhism has three progressively subtle modes of practice which we typically denote as Hinyana, Mahayana and Vajrayana. we need to understand, however, that these terms are mere designations for the sort of practice of which we are possed of the correct capacities. whilst, in the past, there was some derogatory views vis a vie Hinayana/Mahayana, this is more a matter of speaking than a real difference in the nature of the fruit which is reaped.
within the context of the Hinyana practices, Buddha Shakyamuni does teach that one should perform puja, circumambulation and other ritual acts. these are for the express purpose of generating merit, not Prajna, and we need to bear this in mind. the idea behind such teachings for generating merit is to train from the outside in. in other words, before we have an internal realization of Prajna, we need to create the right causes and conditions for such a realization to arise. the most expeident means for doing so, for Hinyana adherents, is through external ritualized actions. this is essentially true for the other two Vehicles as well as they are built on the foundation of the Hinayana. naturally, there are some differences in the approach and, ultimately, the understanding involved in such activities.
in the Mahayana, especially in the Prajna Paramita Sutras, the gathering of merit is turned to a different purpose and, ultimately, a different outcome due to the emphasis placed on Anatta and Shunyata, in my view. some of the differences in these things are due to the various philosophical schools which are found in Buddhism. i suppose that i could attribute all of the differences to this, should i be so inclined, though i would tend to draw some distinctions for discussion purposes.
with regards to a Creator Being and Gods et al. Buddhism teaches that there are beings which are called Gods. in point of fact, one of the titles of a Buddha is "Teacher of Gods and Men". however, there is nothing which can rightly be regarded as the "ultimate ground of being" within the Buddha Dharma. thus, Buddhist thought does not agree with the idea of a Creator Deity, in whichever manner such Deity may be conceived. the Gods, for all intents and purposes, are the same as you and i in that they, too, are subject to karma and eventual rebirth. whilst it is true that their lifespans are significantly longer than a humans, it is not eternal.
i've sort of rambled around on this post and made some claims and so forth which may be confusing and (hopefully not) incorrect. as i say, this is based on my own understanding of the matter, as incomplete and shallow as it may be.
metta,
~v