Well, since this has been brought up again, it's time for me to add..
My car (05) has had this problem since I bought it a year ago... Water on the passengers floor after a hard rain, coming from the blower motors bottom weep hole.
I have taken it to the dealer 2x and got nothing out of it. I did some diagnosing in my driveway the other day and came up with this...
Look at the picture below, the blue arrows represent water flowing down that has landed on the top lip of the rain hat. (this is not my picture, it came from someones post in my cabin filter thread located in my sig). The green arrows represent water that drops off the rain hat and past the cabin filter / air intake (safe water). The RED arrows represent water that drips off the rain hat and ON TO the cabin filter (water that I assume creates the leak), then through the air intake, through the blower motor, and onto the floor.
[img]http://126.96.36.199/images/rainhatleak.jpg' alt='' width='800' height='600' class='attach' />
I'm thinking I have to reverse the angle of the rain hat from up, to down and see if I still have a leak, since there will be NO opportunity for water to drip onto the filter. I ran a TON of water from a hose over that area of the windshield, and this is the only way water got onto the cabin filter.
I know my car is still in warranty, but I don't like letting my car go, and I don't have a way to get to work 35 miles away unless I get a loaner. but it's been there 2x and they have never found anything. It dosen't do it all the time, but after a HARD rain, or LONG decent rain, I'll have some water on the passengers floor, which drops from inside the blower motor, I've witnessed it more than once.