Hi, jet101:
Sorry for the delayed reply. I am currently looking into implement Asterisk 1.8 and gtalk in OpenWRT. Even though I didn't have a solutions for Dockstar implementation, I do have a few interesting things to report.
I eventually successfully installed OpenWRT on Dockstar with the help from posters in other forums. However, Asterisk 1.8 is not available for Kirkwood, on which Dockstar is based. Even when I try to install Asterisk 1.4 or 1.6 using opkg, I still have some problems for some basic functions to work such as register to a voip service. I also tried to install A1.8 on Sheevaplug Debian on USB, it did exact the same things, as you have observed. So it is not Dockstar issue but more a combination of A1.8/Debian/Kirkwood implementation.
Now the good news. Following Mario's post (
http://supermario-world.blogspot.com/2010/11/asterisk-18-and-native-google-voice.html?), I first opkg installed A1.8/gtalk on OpenWRT, embedded on my Buffalo router WZR-HP-G300NH. It works perfectly. I then found an old SimpleShare NAS which have a processor that Mario also developed A1.8 Package for. After installed OpenWRT on it, A1.8/gtalk also works fine. So the problem is not ARM but more Kirkwood specific.
I also tried to use the same config files that worked on Dockstar Debian. It worked first time but then the problems returns.
In conclusions, looks like A1.8 will work on ARM based OpenWRT platform but not for Dockstar/Debian yet. Currently, there's no A1.8 packages available for Kirkwood OpenWRT. Unfortunately, I have neither experience nor knowledge to make such a package. Hope somebody will be able to come up one soon.