I feel your pain, as we live in Colorado, oh say over a mile above sea level! And yes, it's cold here to. My wife and I are going to dive in the Bahamas, St. Thomas (USVI), and on Grand Turk next month. Should be very nice.
Colorado... ummn... so... where are cool places to dive in Colorado? I've been thinking about coming out there this summer to get some "altitude diving" training and for the fun of "going up to get down"...