Yes, I've been doing mine in the jug blender attachment, just be careful that the lid is on properly and only blend it a few seconds at a time. It comes out like a frothy cappuccino - lovely and creamy!
Ooops, didn't say anything out hot stuff with my Rocket (exactly the same as the Bullet) instructions. Can't be too big a problem though 'cos I've been doing my soups in it for the last few weeks okay. The thing I've noticed though is that they really only need about 6secs otherwise they're too frothy. Usually do the shakes for around 10secs.
It's a really great blender, various names but essentially the same thing; Amazing Bullet, Magic Bullet, Rocket. Prices vary from a staggering £80 for the original type via shopping channels, down to about £20! I paid £25 for mine a year ago and it's still going strong.