I finally got my act together and built a transceiver. It's for 40 meters CW and has about 4 watts output. Some of the details may be of interest to other homebrew experimenters.
One of my motivations for building and Arduino controlled DDS-60 was to use it as the VFO for a QRP transmitter. I have had success with this by using the RF stages of the Universal QRP Transmitter Mk-II by Wes Hayward W7ZOI as described in QST April 2006. Click here to download the article for free from the ARRL.
I've been having fun with QRSS over the last few weeks. My Arduino controlled DDS-60 has been transmitting "barefoot". i.e, connected directly to an antenna tuner which goes to a balun which feeds the ladder line out to my antenna. It's been running for long periods sending very slow CW using frequency shift keying with about 6 Hz shift.