本周，我们开始研究iOS4.1在iPhone3G上的表现是否比4.0更好，是否将一个备用的拇指驱动器变成了一个便携的隐私工具包，是否可以轻松地重新安装操作系统而无需太多麻烦，等等。

• iPhone 3G Speed Test: iOS 4.0 versus iOS 4.1 iOS 4.0 was so slow on our 3G, we promptly downgraded after updating. Earlier this week, Apple announced, among other things, that iOS 4.1 fixed performance on the iPhone 3G. We put their claim to the test.
• Top 10 Fitness Tips and Tools You can do a lot with your mind and a computer, but a healthy and honed body will get you even more out of life (if only more of it). Here are our favorite tips and tools for staying in shape.
• Without a Trace: Turn Your Flash Drive into a Portable Privacy Toolkit Whether you're trying to increase your security at an internet café, tunnel your way to your home computer from your cubicle, or leave no trace on your friend's borrowed computer, a flash drive turned portable privacy toolkit is invaluable.
• The Best Things to Buy in September Lots of stores are looking to make space for their big fall inventory push, and everything left over from summer is going cheap. Time to look into cars, appliances, holiday airfare, and other good buys in September.
• Starting From Scratch: A Step-by-Step Guide to Reinstalling Your OS If your computer's running slowly and you've tried everything else, it might be time for a fresh install of your operating system. Here are some tips, tricks, and best practices to get through the process quickly and easily.
• How Much Faster Is Google Instant? Google Instant likes to think it's pretty fast, but how fast is it really? We pitted regular old Google against Google Instant, complete with its time-saving shortcuts, for a head-to-head comparison.
• How to Update Your Insecure Passwords and Make Them Easy to Use You know how important strong passwords are, but you've got a huge backlog of passwords-some you can't remember, others you've been using for years. Here's how to securely update, create, and manage your passwords on any computer.
• Live Up Your Extra Day Off with These DIY Projects Got some spare time on your extra day off? Why not put it to good use in your kitchen, backyard, or entertainment center? Here's a few great projects you can pull off in your spare time today.
• Five Best Mobile To-Do List Managers Managing to-dos from your desktop has its perks, but being able to carry that to-do list in your pocket is even better. Here's a look at Lifehacker readers' five favorite mobile to-do list managers.
• Android Notifier Sends Notificati*** from Your Phone to Your Desktop Android and Mac/Windows/Linux: If you don't want to deal with your phone while you're at your computer, free app Android Notifier will send all your phone's call, SMS, and battery notificati*** to your desktop.