I too think that this is a fantastic voip program and use it effectively on my laptop. However, I'm yet to see a SIP client work properly from a windows mobile device. I want to get Express Talk working on my Jasjam but have the same problem where there is no output of sound through the test, and although the phone correctly rings out to a land line via Express talk, neither caller nor receiver can hear any sound (except for broken static).
Also, I'm it seems like a default sound output from the normal phone earpiece (ie the sound you that you listen to when the phone is near your ear) is a logical and sadly neglected default behaviour of existing SIP clients. I would like a speakerphone option but hardly wish to use this be default. This WM5 version of express talk is sooo close to right. It's going to be good to see it get over the line in the next little while (fingers crossed).
