Funny you mention it... We recently drew up a DRP, and before we got the chance to test it, things started exploding. Hell, even our business DRP is being tested in the real world at this moment - we're in the midst of an emergency relocation of a significant portion of our physical plant operations (we didn't have any data operations on that site, save for a PC to blare music)
The rollout of several new pieces of kit have been delayed because our existing stuff has been dropping like flies. We even had to take our new fileserver and turn it into a temporary DC until we can requisition some extra P4's.
Hell, even 1/2 of our presentation laptop fleet (they were sexxed up Powerbook G3 Wallstreets, chosen only because of their restrained, sophisticated look) has decided to fail - we've had to port those over to Latitudes until we can find 2 more Wallstreets.