Currently using the FREE IPAM and do love it for a free tool. The only thing I'd like to see in future releases would be folder containers much like the user defined grouping found in the paid product. Because it's a free product I know the features will be limited and am not looking for the full grouping features (catagory, department, vendor, etc) just some way to group related subnets and reduce clutter.
Eventually we'll be moving to the full paid product, but due to the wonderful economy new projects/software have been halted.
Thanks again for your wonderful products!