There is no Agile Messenger version for your phone
However you can register as a Beta Tester for Agile Messenger J2ME Beta.

Agile Messenger J2ME Beta is a new Java version of Agile Messenger which connects to AIM®, Yahoo!®, MSN® & ICQ® and will work on most modern mobile phones.

To download Agile Messenger J2ME Beta go to:

http://www.agilemobile.com/j2me/
 
Custom IM Client Development Services
Agile Mobile develops custom branded IM clients for mobile operators, service providers and device manufactures. Supported protocols include: XMPP / Jabber, SIP/SIMPLE and IMPS.
..........................................................................
Agile Messenger Now Available for iPhone
Agile Messenger is now available for iPhone