Nowadays we still have rainbows in the sky after it rains, and many groups and organizations have adopted rainbows as a symbol, including the gay community. You might see a rainbow bumper sticker or flag or t-shirt, probably even tattoos I"m guessing. You can find all sorts of info online regarding the history of the use of the rainbow to represent gay pride, I found a couple including this short blurb. I think perhaps some religious people might feel that the gay community has essentially hijacked God's special sign to us and are offended or upset, concerned about the precious promise the rainbow represents is being denigrated somehow. But I think God is very pleased to have his sign of the gospel being paraded all over the earth by the very people who seem to bear the brunt of so much judgement and condemnation!
Sign of the gospel? How did I come to that conclusion? Well, actually the whole story of the ark is a picture of Jesus and how he carried us safely through God's wrath and judgement for sin. When we are in Christ, we are never judged by God, can never be judged or punished for our sin, in fact our sin is all swept away in the mighty flood of God's wrath poured out on Jesus at the Cross. The rainbow comes after the storm of his wrath as a sign to all generations that his judgement is OVER, as in FINISHED! Think I'm stretching this too far, reading too much into it? There is a small reference in 1 Peter to baptism being like the ark...but one of the best passages ever is this one:
"To me this is like the days of Noah,
when I swore that the waters of Noah would never again cover the earth.
So now I have sworn not to be angry with you,
never to rebuke you again.
Though the mountains be shaken