Actually, I was just posting to the "Happy Newbie" thread, which also has to do with a lack of water coming out of the faucet, but I'll give an abbreviated version here…
1 - Is it only one faucet, or all faucets and the toilet that's having a problem?
2 - Is it only the cold water, only the hot water, or both that's not working?
The answers to these two questions will do a lot more to identify the problem than all manner of guesswork.
Engineering: Finding complex solutions to simple problems you didn't even know you had.