Service to connect instant messaging (msn/icq gtalk etc) with your websites visitors?
Basically, I want my users to be able to just click a button and get a small popup-window that puts them in contact with me through one of the major communicationstools.
Does anyone know about any such services?
You'd need to cover a lot of different services, and hope they were running that app when they visited your site.
Use Live Chat or similar - you've probably seen the type of thing around:
http://www.chat4support.com/ - free version
http://www.craftysyntax.com/ - free (plus pointless following eyes on homepage).
I've not tested them so can't give any info on how good they are...hope this helps.