Some are predicting sales from the more expensive 3G-capable device that rival initial sales of the WiFi-only device. Piper Jaffray & Co. analyst -- and long-time Apple watcher -- Gene Munster claims that Apple sold 300,000 of the 3G devices on the first weekend. The Wall Street Journal notes that Apple says that it has now sold 1 million iPads overall. Information Week, meanwhile, reports that the 3G iPad is "nearly sold out," with customers wanting to order online from Apple being told that there's a wait of up to a week for new purchases to be fulfilled.

Here's a video showing off a new 64GB 3G iPad from one early adopter via YouTube Inc.

Hackers have already converted the AT&T Inc. (NYSE: T)-supported 3G iPad to run on T-Mobile US Inc. 's network, PC Word reports. The iPad is an unlocked device but uses a microSIM rather than a regular SIM card, so folks that want to get on T-Mobile need to be handy with the scissors. The question of why exactly users would want to do that remains, however, the radio in the iPad only supports T-Mobile's older EDGE network rather than the faster 3G it can run over on AT&T. (See CTIA 2010: Where's Carrier Support for 3G iPad? and Apple's iPad: Unlocking the 3G Myth.)

Early reports suggest that the 3G iPad may throttle back video resolution on at least some applications. iLounge says that the 3G iPad's YouTube application runs video at "dramatically lower resolution" over cellular, compared to WiFi, while some apps -- like the ABC Player will only run over WiFi.

— Dan Jones, Site Editor, Light Reading Mobile