Image by Evan Hamilton via FlickrTrying to keep up with Internet safety is a daunting task. Daily, there are changes in security, news stories that alarm parents, and more ways in which the thugs are invading our privacy, often illegally. This site: Internet Safety.com has a helpful website and a blog that appeals to parents as well as teachers to stay informed. More information is at this post from the blog "Parents Want to Know". Disclaimer: I write that blog as well and try to add new information about Internet safety or monitoring.
I am an avaid iPhone user and love the device and was quite pleased to see a monitoring program for parents to control. The statistics about availability of porn on the Internet and how easy it is to find it is quite un-nerving to me as a parent of two teenagers. There are explicit podcasts, free downloadable books, images and videos on YouTube.
Don't assume that your child's phone is protected. Make a plan for checking it often, and check text messages, photos as well as any videos or unknown phone numbers in the list.