I'm not quite sure what the deal is. On the project page embed_widgets is described as being able to embed blocks, but a search of the code base shows that the word 'blocks' only exists in the hook_theme() implementation. AFAICT this module cannot embed blocks.
Comments
Comment #1
dalinIt seems that there is a facility to add blocks in 1.0Beta1, but not 2.0Alpha1.
Comment #2
jtsnow commentedThe alpha version is just that - an alpha version. Its features are limited. It can embed blocks, but there is no user interface for doing so.
The latest dev version DOES have a user interface for embedding blocks.