Power strips are great, but definitely have their limitations. The Power Strip Adaptor Set is an easy way to get around the main complaint and limitation of many cords that have bulky converters at the end of the cord.
The single review by a user says they do exactly what they say they're going to do. It's not a flashy product, but very practicle, and far cheaper than a PowerSquid if you need the flexibility.
Available from Amazon.com for $9.98.