Ted I haven't but I can certainly share my current setup and the options I've been playing around with:
I have a 2009 Mac Pro with 2 HDHR-Primes...
Using hdhomerun_config, more info is available from SiliconDust here http://www.silicondust.com/hdhomerun...evelopment.pdf
hdhomerun_config set /tuner/vchannel 507
hdhomerun_config set /tuner/target udp://192.0.0.2:1234
You can setup a UDP stream which you can pickup in VLC, after setting a vchannel (virtual channel).. from the command line you can then stream to an ip and a udp port.
While its easy enough, I've found I prefer the ease of applications such as SinCast which supports HDHomerun and is a ridiculously powerful IP streaming app, it costs a few bucks but having talked to the developer dealing with a couple issues he's on the ball, friendly and very active.http://www.sinderon.com/software.htm(I have absolutely nothing to do with Sinderon beyond finding mention of them in a forum post on SiliconDust.)
I'll often just setup a stream to VLC through SinCast because its just a simplier way to accomplish the same task, and handles locking/unlocking of the tuner without you having to worry about setting the vchannel to 'none' when you're done so you don't lock the tuner out for your other apps.
I've used it either through a Windows 7 server I have setup, or a VMWare Windows 7 VM with no problem at all.
And while this solution works its hardly a 'flipping' through the channels experience like EyeTV, as each time you want to change the channel you have to stop the stream, change the channel and start a new stream.
I'll often watch TV, and have since the early days with an old STB TV Tuner card 15 years ago in a windowed environment while I work. While I enjoy the full screen media experience, its not as conducive to productivity as you'd think
It amazes me that in the age of hacking hardware to the nines that there isnt a great 'windowed' environment solution for the HDHomeRun Prime on OSX yet. Everyone rightfully so is working out home theater solutions, which is great, but that's a 30% use case for me, maybe 20%, most of my time I'd like to just have a TV window in the corner of my desktop streaming its entertainment goodness while I'm multitasking.