Gavin Andresen - 2011-04-20 13:30:49

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The 0.3.21 release (I hope to have a release candidate available today) will support full-precision values-- you will be able to send 1.00123456 BTC, if you like.

Sending less than 0.01 BTC still requires a 0.01 BTC fee, though.  Changing that to "sending less than 0.01 BTC requires a 0.001 BTC fee" might be worth thinking about, but I think there are higher priorities on the core bitcoin TODO list.