I found this program, link below, called PICQ. Supposedly it'll let you use ICQ, SMS, and E-mail. I can't find any information on the developer's webpage, datanaut.com.

I was hoping to use this as a free alternative to Treo300SMS while replacing the ICQ I already have on my phone. It's always nice to consolidate, after all. If anyone knows how to use it (it asks for SMS Gateway and Network?), let me know!

Thanks in advance.