We are all do some time off, heck, I took off two days last week and I am taking off two days this week. Recent forum chatter suggests that GoogleBot, Google's spider, has been slacking off a bit. A WebmasterWorld thread named Googlebot isn't crawling is now five pages long, with many Webmasters reporting that GoogleBot activity is relatively low compared to the norm.
What can this mean for a particular site and its ranking? Well, if GoogleBot is slow in general and not on your particular site exclusively, then I doubt you have anything to worry about. So keep an eye on your spider activity, less activity, can mean less fresh crawls and less fresh content in the search index, which means less search engine traffic.
Forum discussion at WebmasterWorld.