multitask is a word to define a set of techniques to give you the impression of running more than a task at once.. so is not an exotic computer-term, is an abstraction and can be used many ways.
The most important techniques are the scheduler of the OS which maintains the priorities of the processes (not apps) and another one, the processor context switching (saves the registers of the process for latter restore). there's also the processor threading and multithreading, vm, pagging, ...etc.
when i said Connectivity Multiasking i want to refer to the switch that we do between two internet dependable apps to do something (or correctly speaking the iphone OS scheduling its processes and/or threads when in background of these apps).
You can already switch between a call over one more app, for example that's cool. Isn't cool that you cant do that over an Im app and contacts for example..
