Replaced my dock connector because it became corroded and didn't function.
Everything went well except the screws holding the dock connector in were a BEAR! I tried not to, but ended up stripping them completely. I used a small flat head and a hammer to make notches in the screws and with A LOT of elbow grease finally got them out. In that process, the home button ribbon became damaged. Now my physical home button doesn't work, but Apple thought of everything, and under "Accessability" there's an option for a virtual home button. My phone works great now and I was especially happy to be able to get my honeymoon pics off it. Thanks ifixit!
Buy the driver kit because the phillips they sent doesn't fit the screws perfectly. Also, be very gentle with the home button ribbon.
Phillips #000 Screwdriver
P2 Pentalobe Screwdriver iPhone
iFixit Opening Tool
iPhone 4 (CDMA/Verizon) Dock Connector