Rezwan has further details - and many questions - on the yesterday’s bombings in Bangladesh.:

When around four hundred small bombs explode in 63 districts out of 64 districts of a country simultaneously it shows what kind of network the attackers possess (imagine 50 states out of 51 in US). The mostly hit city was the capital Dhaka with around 30 bombs explosions including key installation like the Zia International Airport, Supreme Court, Secretariat etc.
The casualties and injured numbers are so far incredibly much less (2 deaths and 150 hospitalized). The question may be why is that. The bombs were confirmed as small IEDs (Improvised explosive device) containing not much explosives. From the TV reports of the unexploded ones I have seen that each contained four batteries and some small devices and a switch attached to the bomb by red tape. Most probable the switch activated the delay device and it exploded sometime later allowing the carrier to leave it and flee away. The most remarkable thing of these bombs is that they contained wood saw dust instead of splinters. That is why there are fewer casualties although they were exploded at manned places. Actually many received minor wounds of saw dusts hitting the body with the power of explosion and went home after emergency medical attention. If these were loaded with more explosives and deadly splinters, we could have seen thousands of dead people.

Gateway Pundit has a news and blog roundup of the blasts, including a video link, and he notes a claim from authorities that there were 500 blasts.

Joe Gandelman at the Moderate Voice also has an excellent roundup, featuring an array of regional and international media sources.

Further posting at Chapati Mystery and Sepia Mutiny.