For those of you that happen to have an iPhone 3G or are getting an iPhone 3G-S this is a must read. (please note, links are provided for those that have no idea what I am referencing so they can find out)
As you all know Apple has recently upgraded the iPhone OS to 3.0, on the laundry list of features is Internet Tethering. AT&T claims not to support it but in fact it works like a charm showing up as standard iPhone Data usage. Now you may be thinking, I have a BlackBerry, I can tether with it if i pay $30/month, why is the iPhone so cool? Simple. Over the 3G connection on the iPhone 3G/3G-S you can be in a call with the handset or using a Bluetooth headset, you can be texting and using the internet on that nice MacBook. But not only can you do all that at the same time. You can take that shiny new MacBook, ans share the connection out to the Wireless and Ethernet adaptors (yes, both at the same time). Meaning you can connect 2 clients via the WiFi interface and 1 or more (would need a hub or switch) clients via the Ethernet interface. This means you can provide an internet connection to a decent sized group of people anywhere you go.