Hi,
About the paid version it will have
1) Company brandings or OEM
With company logo, control name and different object id and without popups/message boxes/system tray icons.
2) Codecs support
G729A, ilbc, gsm, speex and G711 codecs can use used.
3) Client license
Unlimited copies distribution for clients.
4) Customizations like fetching balance from urls
*Automatically posting userid/passwords to get the balance, call rates etc by GET or POST methods.
5) Tunneling over TCP
*Can tunnel out on encrypted web ports, separate setup required on server side. (beta)
6) IAX on different ports
7) Authentication Encryption
Using RC4 algorithm. (available with PHP version)

3 months bug/fix and features updates.
9) Can be programmed with any COM supported language for PC development (e.g VisualBasic, Microsoft Office, VisualC,Delphi etc) and can be used with any server side script for webphone and click2call scripts (e.g PHP/Perl/ASP/C#/HTML etc)
Also I can add other features on request, depends on development time.
300$ for single hostname (IP address or FQDN*) so it will only use with
one asterisk and unlimited copies of controls for web phones and click2call scripts.
My Cab signing certificate will be used, but if you want to sign it yourself you can, I will not provide my certificate with the licensed control, i will just sign it.
Thanks and Regards,
Babar Shafiq Nazmi.
*FQDN=Fully qualified domain name of asterisk or public IP