For now, you can download the portable builds from other sources by searching the MD5 checksums on Google. That's what I did.
ccsetup563.zip 81cfdec318e58fbd43cb19df30bcd3e9
dfsetup222.zip 0fdf3f6dc5068e76c312797941307d75
rcsetup153.zip 74ecd76dfbbe241f454cd66a30066b88
spsetup132.zip c4d4604b7a7046ce120fa521c523afb8
I've gathered these checksums from the original announcement threads.