I'm using a PNG right meow, but a JPG would work too. The dimensions are 238 wide by 44 tall. As to the job postings, as much as I wanted to import all of the old users and data, I can't be confident that those accounts were not compromised. So, it just wouldn't make sense to go through the hassle of getting a new server and new software just to import bad data. I'm not worried though, build it and they will come (so to speak).