The obvious answer would be the EyeTV Hybrid
Do you own both an HD Homerun and a Hybrid and can verify they work well together? I suspect that's what Phillie is hoping to find out...I know this has been discussed in the past, I vaguely recall someone got an EyeTV 500 and an HD Homerun to coexist peacefully on the same network, I think that was because both devices were recording the exact same channel menu. Best bet may be to search through old threads...
EyeTV software has always been crude when it comes to dealing with multiple tuner devices, assigning tuners to particular channels, etc.