Daylight Savings time was to be enacted today (0200 on 10/29/07), but was postponed by the Bush Administration for .. well, for .. umm. Because.
See "Daylight Savings Time: Smells like Y2K Spirit" and "Did you and your computer survive Daylight Savings Time?" for some answers and links.
Newer (XP and Vista) systems were patched automagically, but Windows 2000 and older? No.
Devices? Fuggedaboudit.
However, whitepapers exist to fix this stuff. Pay a visit to the Windows Mobile Updates for Daylight Savings Time page for your Windows Mobile device.
Some mobile devices weren't quite that lucky. Even with the patch above (and the update from Verizon), I had to change time zones to Eastern and back to Pacific on my Treo to get my appointments to show up at the right time.
Some folks got bit. A little. At least we were all early. In the news:
On the more serious side, check out WorldTimeZone for "Daylight Savings Time News" and get the real scoop.