Samsung’s really building out its platform, with two major announcements today.  First up is the launch date of the anticipated Galaxy Tab tablet, which will run Android 2.2 and includes full Flash support.  Samsung’s other news is related to its software platform, which will be a centralized initiative for its smartphones, tablets and televisions.

The Samsung Galaxy Tab will be available in Verizon stores, starting November 11.  It’s going to be an alternative tablet option for Verizon customers, as the Apple iPad will be featured there as well.

More expensive than the iPad at $600, the Galaxy Tab will come with built-in 3G connectivity, offered on Verizon’s network.  The iPad, on the other hand, will require a MiFi if you want connectivity wherever you go.  Data plans for both are priced the same, starting at $20 per month for 1GB.

Samsung has been working steadily on an Android tablet, bringing expectations for more iPad alternatives to fruition.  There’s no way for us to have a full direct comparison until the Galaxy Tab becomes available, but Android tablet development in general has faced a umber of setbacks for manufacturers in recent weeks.  Lenovo, for instance, has further delayed its Android tablet plans, with word it’s holding out for Android’s next OS update.

The gradient of Android’s OS has been problematic, but also encouraging for others to develop platform offerings of their own.  Several manufacturers and wireless service providers have indicated plans for their own Android app storefront, with several offering platforms for direct distribution of apps.

Samsung’s had an app store for some time, offered through devices like its recent television sets, featuring quick access to things like YouTube, Flickr or Netflix.  Yet today’s announcement regarding a singular platform for several of its devices introduces a united front for the manufacturer to attract developers, and earn some app revenue while it’s still ripe for the picking.

Few details have been revealed on what Samsung’s platform will be about, but as electronic devices become more mobile and interactive with each other, a unified platform offering will present a more seamless consumer experience.  Google has similar aims for Android, and is leveraging things like Google TV and Chrome to extend that seamless experience to its users and developers.