My official position has pretty much been the same as Derek's -- there's a short-term crimp in the supply due to worries about lack of Congressional action and also a lack of industrial capacity. There are also long-term worries (helium is a non-renewable resource, after all.) But we're not going to run out of helium in the next 20 to 30 years, as there appears to be plenty of industrial capacity coming online.
All of this to say that there's a WhiteHouse.gov petition to encourage the President and Congress to pass a bill to address the Federal Helium Reserve issue (which the House has one version, and the Senate has passed another (just yesterday!)). Now the bills need to be reconciled, passed and given to the President for his signature.
If you are so inclined, sign the petition!