The last snowstorm was not too hard on all-smiles Bloomberg but new Schools Chancellor Cathie Black has not been so lucky. It isn't so much that everyone ignored her decision to open schools Wednesday but that instead of going to visit a SI school as scheduled she stayed in Manhattan for a press conference. One SI kid who shoveled his parents' driveway at 5:30 a.m. to get to school did not like the double standard, fuming: "She doesn't have to go to school, and we do?" But to be fair to Black, all school trips were canceled on Wednesday.