MakeUseOf.com Guides Roundup: iPhone Guide, Ubuntu, more for free

MakeUseOf.com offers downloads of a selection of its guides dealing with various tech-related topics for free, as listed below. The guides:

• The Underground Guide to the iPhone (pictured)
• The Ultimate Guide To Your Windows Mobile Phone
• The Incredible Guide to New Ubuntu Karmic Koala
• A Computer Geek’s Smart Productivity Guide
• see all free guides at MakeUseOf.com