I just received (2/15/06) my welcome letter from Dell for the purchase of an XPS 400. I received my computer on 2/2/06. The phone number they just sent me is 1-800-232-8544. Prior to today I have been using 1-800-624-9896. I called this new number 5 times in a row and 3 times I got XPS support and they identified themselves as such. Using the old number I don't remember any of them identifying themselves as XPS support. Regarding the other two calls, once I got Small Business Customer Support and second I got Dell Dimension hardware support. I followed the same steps for all 5 calls.
I am sadly returning my computer. I have to wonder if things would have turned out differently if I had had this new number, because I am wondering if I ever really had the XPS level of support.