Palm GPhone does SIP
SIP stacks for handhelds and smartphones mean more edge devices plugging into the VoIP cloud. I had a discussion the other day about the lack of text messaging uses in North America. I actually think that we are so far behind in use that text messaging will get leap-frogged by IM and VoIP options.
Gphone solutions are based on VL Inc’s propriety GPhone engine. GPhone is focused on enabling high quality full duplex VoIP on resource constrained devices. VL Inc: Palm GPhone Specs
Known to work with the Tungsten C, the requirements are listed as Palm OS 5.0 and a StrongARM 206 or better.
(via Jeff Pulver Blog)