I hope this is the right place for this question. I have a cdma wireless internet service in China. The service is hecka convenient but is not fast enough for Skype. Is there an option that will work with a 40 kb/sec connection?

Also, how do programs like Ventrillo and Teammaster and Skype compare in terms of security? MSN? Yahoo? Is there something like PGP keys that can be used with VOIP to improve the security? I hope it is OK to mention names on this site.