I was currently accepted into the PTI program on Monday Jan 30th 2012 and was wondering when I would be contacted to see my PO. Would I be receiving a letter in the mail and how much time do they give you notice to go meet them or do they just show up at your house. Ty

While they don't normally just show up, they can, they are allowed to search your home and car to see that you are not in violation of any of the terms.
You should have a number to call on PTI and it is never wrong to check in. My best guess, about one to two weeks letter to meet PO and that will be about a week after you get the letter.