Blast Factor is the download in question.
IGN reports that the Sony Answer to Geometry Wars will sell for 840 Japanese Yen or approximately $7. Now for those who are screaming highway robbery, be patient. Sony is offering a free demo download for those who want try it before they buy it.
Blast Factor will require around 95 MB on the HD, which of course suggest that even the simplest of PlayStation Network downloads will exceed the size of the original XBLA titles. Well, that's what we're speculating.
Pricing plans for PlayStation Network titles outside of Japan has yet to be announced, but at least we have figures to work guess-timates around. Figures and numbers can be so refreshing sometimes, in the light of on-line pseudo debates about the Network's effectivity.