Apple's inventory of the new iPad is holding up well, especially in the US. Unlike the iPad 2 which faced shortages when it launched, the new iPad is readily available. Most US retail stores have at least one model of the iPad in stock and the online store is steadily improving shipment times. As noticed by CNET, shipping times for the iPad are now at five to seven days, down from one to two weeks.
While the US is doing well, iPad supplies overseas are a bit more constrained. Online stores in the UK, Italy, France, Germany and other European countries still list a one to two week wait time for the new iPad.