adapt
Im not sure whats happening with the enterprise world , but for home consumers dell is under a lot of pressure. These computers are falling in price all the time, and with the arrival of the linux mini laptops pressure is on even more. My eee PC cost £160 , there just isn't much profit in something that costs so much less.
Personally however, I did get work to buy me a new ubuntu dell machine. Its very very nice. When the market does switch to linux, maybe dell can recover. HP dont sell /support that much in the way of desktop linux which will bite them in the arse one day.
(I said when not if, with the expectation the onslaught of ms and apple fans - unless you start giving away your OS , it is simply a matter of when).