Ekiga (build with v4l use flag) did not recognize my V4L webcam, ptlib (2.6.7-r1) was not build with v4l use flag. After remerging ptlib with v4l enabled, the cam works fine (and is shown as "PTLIB/V4L2" in ekiga). net-voip/ekiga[v4l] should depend on net-libs/ptlib[v4l] (at runtime). See also http://wiki.ekiga.org/index.php/Compiling_Ekiga#PTLib_2 Reproducible: Always
I've fixed this in the tree, thanks for reporting!