They do, but it's missing a lot of the features. The Open Source version makes it brings the capabilities down to the level of Nutsmail! while bringing the Ajax capabilities of RoundCube. If you want something that can automate people's time better than Exchange/Outlook WebAccess, with more capabilities, you need to spend the $35/user. I see them missing a great opportunity here. They no doubt have a lot a work into it, and should be compensated well for it. But the way it stands, they will never get the word out at that price when Exchange + Outlook Web Access + Sharepoint Services is something they may already own. IMO, the only audience they can garner this way are the dyed-in-the-wool Microsoft haters. Also, I don't think having the price up there will make them more money. I think they will make less.I believe they have an Open Source webmail client.
good thing I removed UebiMiau from my system the day I installed DA.
I vote Ubtmail