Yosemite's Widow's Tears, America's longest continuous ice climb and also one of its most elusive, has had a rare ascent on Janurary 15.
From Rock and Ice: Nearly 1,000 feet high, Widow’s Tears was first climbed by Kevin Worrall and Mark Chapman in the 1970s, and is one of Yosemite’s first waterfalls to dry up, and requires a rare combination of leakage and a cold snap to form. The exact number of ascents is unknown, but likely remains but a few dozen. Ratings for the route vary depending on conditions—it can at times have mixed climbing on rock, but is generally WI 4 to WI 5.
What's significant about this is that ice climbing gear, and ice training has become so advanced, that uncommon ascents seem to be coming more common.