MAXL221,
Are you experiencing some "screen freeze" issues?
The reason I am asking is that I encountered the same problem. It started a few weeks ago I have had the clicking/pong noise coming from the left side of my MBP. Went to the genius bar, was told that the HD checked ok and that everything was just fine. Few days later I started to experience some screen freezing issues and within 2 days the HD failed (still could hear the clicking noise)....
This is where it becomes interesting:
Went back to the Store, talked to the genius, he took some notes and confirm that the MBP would not boot, also took note of the clicking noise also took note of the fact that I was a Procare member. I was told that someone would look at it and that I would be contacted.
That afternoon a tech from the store called me and told me that the HD was ok but I had to do a "Archive & Install" from the Leopard disk (he suspected some file corruption). I asked about the clicking noise: "what clicking noise" he asked.... I explained: "sorry but it is kind of noisy up here I'll check again and call you back"....
10 minutes later: Yep! it's definitively making some abnormal noise, we think the HD is going bad...
Took the MBP for repair, it was suppose to be done in the store (Procare member), then another snafu they sent it to TX for repair.....
This took place last Tuesday.... Still waiting to get my MBP back....
So, if you go to the store, make sure they know about the clicking noise as well as any other issue you might have. If they keep you MBP for testing, I would recommend a follow up on your part. You want to make sure that whom ever is working/testing your machine is aware of the all the facts (they don't seem to read all the info the genius records on the troubleshoot sheet).
And finally if you are a procare member, insist to have the MBP repaired at the store. It takes about 1 hour for the repair and maybe another hour to test. If you let them send it for repair it's going to take a week.
Hope this help and that you'll have more luck with your store than I did..
F