As noted earlier this week, this a big day for AT&T, and everybody involved in finally bringing MMS functionality to the iPhone is worried about the strain today's launch will have on the network. Insiders involved in the launch tell Broadband Reports AT&T expects usage to surge on their network today to the tune of 40%, as users tinker with the new functionality. AT&T's announced the launch over at the Facebook page, which notes MMS will only work for iPhone 3G and iPhone 3GS users, but not for original iPhone users:SMS/MMS bundle pricing does not change: AT&T's $20 unlimited, 1500 for $15 or 200 for $5 still applies. Note that if you aren't signed up for a bundle SMS/MMS plan, you'll pay thirty cents to both send and receive video or picture messages, up from the twenty cents you'll pay just to send or receive a text message.

Our update was smooth as silk, with an iTunes and carrier update taking collectively less than a minute (albeit over our fiber connection). Let us know how the update went for you and if you see any network issues in our comment section below. Or, if you're not an iPhone fan, laugh at all the nerd jubilation over a fundamental wireless technology most people have been enjoying for years.