Web based IM through Kool IM?

Someone posted a comment on my blog and linked Kool IM. According to its site:

KoolIM.com is a web messenger application that allows you to stay connected with your favorite Instant Messenger almost anywhere. You need a computer with just a browser only.

There is no need to download and install any software or Java plug-ins into your computer to use KoolIM.com Web Instant Messenger. KoolIM.com provides friendly, light and very easy to use web-based interface with almost all core features from the original Instant Messenger.

Another great benefit of our Web Messenger - it works behind a firewall or proxy servers. Use our Web Instant Messenger to chat with your friends everywhere! We support AIM, ICQ, MSN, Yahoo, IRC, Jabber and others on the consumer side. We also support Sametime, Simple, SIP, LCS, and Jabber on the enterprise side. We plan on soon launching SMS and ringtone support.

Here is the site http://www.koolim.com

I don't use IM anymore much except in Gmail. Can someone test this out and let me know how you like it? Maybe I will feature it on ABC Clicks.