Hi,
Thank you for contacting Elgato Systems.
EyeTV does not have a feature to make its window stay on top of others. I have written a feature request for this.
The product Window Shade X can provide this function for you. More information can be found here:
versiontracker.com/dyn/moreinfo/macosx/12243
Sincerely,
Ned Kettell
Customer Support