I highly recommend the Kinesis Advantage 2. It is a bit pricey (about $360 or maybe more now) and takes about a month to get used to but it is by far the best keyboard I have used. They have a newer model but it doesn't have functions keys so I recommend the Kinesis. It does not have USB ports though.

To me it has very little to do with how they would test their application but rather how they work. Developers are expensive resources and if a touch screen will allow a given developer to work faster or even just make them happier then it is worth it. Now with that said I would say it depends on whether they are working with a desktop or a laptop. I am always surprised when a developer uses a desktop but I know it still happens. To me on a desktop it is irrelevant but on a laptop it is useful. That is my 2 cents!