Updated since 11:07am EST with company coment.NEW YORK ( TheStreet) -- Research In Motion ( RIMM) shares slipped 2% Monday on concerns about demand for its BlackBerry Storm. Investors and analysts said there was speculation among traders about a report that indicated orders for the Storm were cut or cancelled. The name of the research shop that produced the note wasn't immediately known. Verizon ( VZ) is the biggest seller of the BlackBerry Storm and presumably the telco that would be most likely to reduce its supply. RIM declined to comment, and Verizon did not have an immediate reply.