Thanks on the congrats. I did feel very fortunate to have the opportunity to choose between three such excellent programs. I did decide on Linfield and just completed my first term and I am extremely happy with my choice. I love the school and their program and I look forward to completing my degree in 2011. I do know I would have been just as happy at OHSU or UofP.
To answer your questions, I did all of my prereqs at PCC Sylvania. I did not have any prior health care experience but I did have a 4.0 GPA.
My advice to you is to look at anything that you can improve over the next year and try again. If any of your science prereqs have lower grades, you may consider retaking them as I am pretty sure that is what's most important to all the schools as far as GPA goes. Also, if you do not have any prior health care experience, you may want to consider volunteering at a hospital or other health care related organization. I do not have specific advice on getting into OHSU other than making sure you know why you want to go to nursing school, what you plan to do with nursing, and what strengths you have that will positively contribute to your program and nursing itself. Having those goals and values clearly defined in your head will help you tremendously when writing the proctored essay.
I hope I have been of some help. Keep at it, I know it is not easy but perseverance is key to not only getting into a program, but surviving one. Best of luck to you