MP3 sharing on the board is a touchy topic. If the moderators were still around and laying down the law then it would surely be a firm no, though with them pretty much gone, that line seems to have been blurred. People post up MP3s on here from time to time, for instance the Regime feature on Yukmouth's album.
I personally don't condone the sharing of MP3's, at least out in the open on this board. I find it to be a little disrespectful to Tech and the other artists the song may include but specifically Tech given this is the Strange Music board. I'm sure everyone has downloaded an MP3 at one time or another though, so what you do personally is on you, so if people are running around throwing links to each other in their PM's or IM's then good for them, I'm probably guilty of the same thing, specially with songs only found on MySpace that haven't been released yet.
I'm sure someone will give you the song through PM, if someone hasn't already. As for getting a whole album for one song, just to note but there is actually a second song on the album that features Tech N9ne... ironically, with the RDV's.