Spidrwmn:
Sorry for repeating your quote below, stupid machine! Anyway, to reply to your questions regarding OCS. I am a candidate officer set to graduate 29 Jun 01. I had a lot of the same questions you do right now. Can I get in? Am I qualified? Am I tall enough, etc.
Everything is based on "the needs of the Navy". You are going to get used to that one. As far as GPA and college credits, clubs, etc. It helps to be "well-rounded", but as with everything else at OCS, it is a mystery wrapped up in an enigma. Do the best you can.
As far as the height thing, if you are 5'5" or below they take anthro measurements at NOMI. If those don't suffice, cockpit measurements will be necessary.
My best advice I can give to you are two things. 1) Start working out NOW! Running 3-4 miles 3x/week and working on sit-ups and push-ups will alleviate a lot of pain at OCS. 2) Get ahold of the "gouge" needed to be learned from your recruiter and start now. Memorize this.
As far as anything else about OCS, well, you get to find out about it like the rest of us did, pain and misery. It is definitely worth it at the end because the person that you are after 13 weeks is a completely different person than goes in.
Good Luck!