This week Lifehacker shows us how to make a monitor into an iMac, how to work out with podcasts and how to buy glasses online.

Make your monitor into an iMac with a DIY rack
Browser speed test! How does Safari 4 beta rank?
Use workout video podcasts instead of DVDs

Turn your attic into a programmer's paradise
Declutter your home with an inventory sweep


Buy glasses online, save tons of money
Nuclear grade duct tape
A sweet wood Windows 7 desktop

I am so jealous of that monitor setup, btw.