Yes, I've currently doing this (not with a Dryer power outlet, but with an electric Range/Stove outlet).

Basically, you need two things:

Thing #1: Tripp-Lite PDU1230, see http://www.tripplite.com/pdu-power-distribution-unit-30a-1u-c19-c13-outlets-nema-l6-30p-plug-208v-240v-single-phase~PDU1230/ -- you should be able to search for it on Amazon and buy it from various vendors.  Costs range from US$150 to US$210.

Thing #2: Adapter to plug into your dryer outlet that converts it into a NEMA L6-30 plug that the Tripp-Lite PDU1230 uses.  I haven't found many places that offer adapters like this.  I ended up ordering from a website that specializes in adapters for EV car (electronic car) owners.  Look at the evseupgade.com website's adapters page: http://evseupgrade.com/?main_page=index&cPath=7 -- you'll need to order the specific type of adapter that matches your Dryer outlet.

I have three 240V plugs in my house--Dryer, Range, and EV Car Charging outlet--and all three are totally different and none match the L6-30 needed by the Tripp-Lite PDU1230.  Ugh.

It's possible you can find some other combination of things, but I'm just reporting what has worked fine for me.  I'm currently a few KNC Neptune cubes from the Tripp-Lite.  In the past, I've powered a pair of SP10's and a pair of SP30's off of it (but they were too loud and eventually moved those to a data center).