I would like to thank everyone for replying, for every answer given gives me alot to think about. cw1865's suggestion of leaving it on the server is just one of the possibilities. I happen to like this as several of my product pages have similar or featured items listed on that page. Combining his suggestion with PaganIL's suggestion of disabling the add button I think is the way I am going to go, and leave those pages until Google drops them since they will no longer be in the site map and they will have no links going to them. My thinking is about after 3 months, then I should be able to get rid of those pages. I am sure the 301 redirects would also work, and work very well, but from a sales standpoint I am thinking if I redirect to a product that is similar and not the actual product, then my visitor did not find what they are looking for and leave. These similar items and featured items may work better as far as a higher conversion rate but I still may get a lot of visitors leaving to find a site that does not have it labeled discontinued. I am going to go this way because if I cannot provide the product to my customers, I am going to tell them so and let other sites get a bad rep for offering a product that has been discontinued.

As far as the second question goes, again thank you to those who responded. As far as the screen size goes, for psp, Blackberry and such, I totally understand why he would want his site designed on such a small size and scale. What I am unsure of is why wouldn't he have a .mobi and have his script display that site if being viewed on such a device. As of now I think my best bet is to stick with the 1024 X 768 standard as that is becoming the standard across the board and see where the industry goes with monitors, web TV's, etc. before I jump the gun and start redesigning. As far as mobiles go, I am tracking that I am getting sales and inquiries from these devices, but as of yet, the numbers do not warrant me to make a redesign and from what I have personally seen my sites display ok, they just have scroll bars.

Again thank you for all the right answers.