I just got a WX Activity Board and a WX wifi module...
Tested out the solo.parallax.com version and seems to work, without having to log in to anything.
Uploaded a test program via wifi.
All seems to work well.
I thought I was going to need the IP address, since the instructions told me to write it down.
But, Blockly somehow finds wx boards on the network automatically.
I'm am able to program via ether USB or wifi without changing anything.
That's a neat trick.
I'm pretty impressed by how far Parallax has gotten with Blockly.
Now, I have to see if I can get my kids to try it...