Earlier this month, Microsoft announced that customers would no longer be charged to load data into Windows Azure. Amazon followed suit today, removing the $0.10 per Gigabyte toll on incoming data and significantly dropping the cost of outbound transfers and downloads. Whilst competitors such as Rackspace Cloud still charge $0.08 per Gigabyte, this trend toward free uploads looks likely to continue. Lowering the barrier to entry makes good business sense, and the easier a company can make it for their customers to upload large volumes of data, the more likely those customers are to use the services in which their data reside — and the harder it will be for them to leave. I can only presume that similar announcements from Rackspace and the others will trickle out over the Summer.