I did it, noticeably louder. Firmware versions are irrelevant, it's a hardware issue. Firmware isn't going to increase the sound permeability of the membrane.
True, but I wonder if at any point they changed the way they were manufactured - even a simple change such as replacing the membrane with a different material.
For these people that say that this has made a huge improvement for them, when did they purchase their phones?
I purchased an 8GB model during the beginning of Feb '08, and my speaker volume is alright, it's not too bad, but it's not too great either.
For example, in a restaraunt setting where people are talking and there's constant background noise/rumble , it can be pretty hard to hear a song playing through the speaker.
I'm still undecided on whether or not to do it. It's not like I use the speaker that often, but it would be nice to be able to play songs for people or show them youtube videos without them having to lean-in to where they are only a few inches from the phone. So, any improvement would be welcomed.