On this one, I am a basher.
My only advice is to stay far far away from Joseph Doxey. He's an aggressive diluter and PRHB is his ATM machine. Every person who stays in this more than a week is a bagholder. I expect another reverse split in the next month or two. If the company is real, it may become a viable investment after that, but I doubt the company is real.
It has it's fans. Why I'll never understand, but it does. Someone here will give you the positives. I won't because I think they are traps to help the CEO take your money.
Warning: there is one person here who insists the O/S is 50 million. Pink Sheets says 850 million as of 3/15/07. It is almost certainly over a billion by now.
Edit: Just thought of another thing. In case you didn't already know, this stock used to be PHBT. After the last reverse split it became PRHB, but the shareholders were so disgusted with the CEO that none (not even the mods) bothered to ask Matt to change the symbol, then a few months later someone else started this thread--so all the sordid history got cut off. As part of your DD, you should take a look at the postings at PHBT.
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VIVA EL MICROCAPITALISMO!!!