I'm still playing the 2nd game so I am really jumping the gun here, but will this game be released on PSN or something like the 1st game? I'd hate to have to dig out my PS2 just for this game, it'd be much more convenient if I can have all my SH games on 1 platform.

viewtopic.php?f=7&t=25154
This thread has all the information there is on that subject.
At the moment, it's only in Japan, but it has a good chance of being released in other regions eventually.
It would be idiotic to release some of the crap PS2 titles they did but ignore SH4, which should have been on the HD Collection to begin with. But I digress.

Ah, thanks.