I've been using the pro version of allwaysync (http://www.allwaysync.com) to do this kind of thing.

You can use regex to define which folders to use, does autosync, deletions etc...

One of the exciting new features of Safari in Mac OS X announced at the WWDC keynote yesterday was the power savings when web browsing as compared to Chrome & FireFox.

Power savings in terms of real-world power consumption isnt the relevant factor here, rather it is the impact in laptop battery life that power savings can have