Blackberry is way too limited.

FORBES: Goodbye BlackBerry: A Reluctant Personal Requiem

So for now, the revenue gains from the Blackberry to Android shift appear limited, but this could change over time.

FORBES: Voracious Android Appetite Eats Into Verizon's Blackberry Business

According to Gibbs, Obama will be able to keep his BlackBerry, though only a limited number of senior staff and personal contacts will have access to his email address, and the data on the handheld will be subject to the Presidential Records Act.

ENGADGET: Confirmed: Obama gets his BlackBerry, no Sectera Edge in sight

We believe the stock outs are a function of strong sell through rather than limited sell in by BlackBerry.

FORBES: BlackBerry Gains Ground; Street Upbeat On Z10's U.K. Debut

Probably not, given the slew of addictively fun and useful smart phone options that consumers have access to now, but there still is some value to be found in Canada-based Research In Motion Limited, maker of the Blackberry handset.

FORBES: RIMM Down But Not Out

The BlackBerry Enterprise Service 10 software as well as a limited sixty (60) day free trial (includes client access licenses) is available to be ordered here.

ENGADGET: BlackBerry Enterprise Service 10 now up for download (video)

As it stands, this leaves T-Mobile without an LTE offering for Windows Phone users, as the smartphone field is now limited to the Apple iPhone 5, BlackBerry Z10, HTC One, Samsung Galaxy Note II and Galaxy S4.

ENGADGET

Connectivity is limited to Wifi or bridged Bluetooth link to a Blackberry handheld.

FORBES: The RIM Playbook: An "Evolving Concept"

The video chat is only to other Playbook tablets, so it is of limited value unless you consider it as an enhanced extension of Blackberry instant messenger.

FORBES: The RIM Playbook: An "Evolving Concept"

With our limited development and engineering resources, we decided to launch Clio Mobile without BlackBerry support.

FORBES: Why One Canadian Developer Won't Build BlackBerry Apps