There's still not a lot to see yet. The buds are clearly visible, but they're in the early stages. The NPS arborists are out doing one of their two annual pruning rounds to keep the trees in tip-top shape. It's still too early to predict the bloom, but sometime in the window of the last week of March through the first week of April is looking good (ie. an average year insofar as schedule).
Want to Help Support DC's Cherry Trees?
If you'd like to help support the care and upkeep of the cherry trees around the Tidal Basin, the Trust for The National Mall has launched an Endow a Cherry Tree Campaign. Donations go to the official Cherry Tree Endowment, which will give the National Park Service additional resources to fund the care, maintenance, and possible replacement of the cherry trees. You can find more information here.
The Trust is dedicated to marshaling private support for maintaining and improving the history National Mall area. I'm not affiliated with the Trust--just an admirer of their efforts.