Actually these could be liquids at standard pressure, its just that temprature needs to be played with. Dry Ice is simply solid CO2. it just tends to sublime at standard pressure and temprature. I guess I should have said "enough heat applied to or removed from" the solid. Of course this is probably way too much chemistry for TSA.

Now I would love someone to point out the storage concept you mentioned. Does any one out there know if the supposed chemicals needed to make the liquid bombs could relatively safely be housed in say the human bladder. This technique has been used by people trying to pass the urine tests. If this is possible, I am not sure I want to know how TSA would screen for this.