For what it's worth, I've just updated my little Chronodot library for Arduino 1.0 compatibility.
I've also set it to maintain backwards compatibility with the older IDEs, just in case folks want to keep using them.
Posted here: http://planetstephanie.net/2011/12/01/c ... ry-update/
File is here: http://planetstephanie.net/blog/wp-cont ... onodot.zip
Someday I will learn how to use Git... If only there were some sort of achievement badge I could earn, to nudge me along...
Edited to add: the only advantage this offers over the DS1307 library, is this one lets you access the Chronodot's built-in temperature sensor - you can get tempF and tempC in addition to the date and time info.