Just got an email today with some great news. Ever since I got into S60 and Nokia smart phones I've wanted to use the built in IM Chat Application with my data connection instead of using SMS messages for every IM like it currently does. Reason being is I have unlimited data and only 500 texts on my monthly plan. This is gonna be a short post because it's Mother's Day and I'm on my wait out taking my mom to lunch and spending the day with her. So I'm not going to show you this step by step by I got it running in seconds.MobJab.com acts as a IMPS Wireless Village and allows you to connect your S60 powered phone to AIM, Yahoo, AOL, , MSN & ICQ. I've only gotten the AIM to work so far so check back if you can get the other settings to work and let us know how.
Go there and register. After registering follow these settings below which are also found on the website. These go in the server settings.
Account name : MobJab
Server address : http://mobjab.mobi:9090
User ID : username of your MobJab account
Password: password of your MobJab account
Access point settings : This is your mobile opertors gprs/data
connectivity
Proxies:
This setting specifies whether or not your gprs/data connections
will be routed through a proxy. Enable this setting if you
will be connecting to an alternative Wap Proxy/Wap Gateway.
Data Bearer: The data bearer that will be used for the connection
(e.g., GPRS, EDGE, etc).
Hopefully you get it to work. This is great news for me I've been waiting for this. Not sure if I like it better than other option yet but I'll check back and let you know.
Update: thanks to dr. tran i realized it's not loading up the full contact list. Hopefully we can work out the kinks.


there are a few other choices for free IMPS services, such as yamigo or onesoup.
there are all similar service access points, yet quite different when it comes to implementation. the key differences are having to give out your password (in mobjab and yamigo you have to, in onesoup you don't), polling and bandwidth costs.
yamigo's connectivity to YMSG and MSN seems to be broken, and only AIM/ICQ are working. maybe the same issue is affecting mobjab.
from my side (onesoup), which i run as a side job, i am currently only supporting gtalk (since it's XMPP/Jabber based), and i'll add support for OpenAIM/AIM/ICQ soon.
the limits you mention re. roster size are due to CPU/memory constraints of the embedded clients. both mobjab and yamigo are limiting the number of entries in your roster to avoid crashing your phone. i believe they are however getting it wrong. i think SIP, now integrated into the Nokia S60 address book will take over for unified presence.
Hi
We operate MobJab. Got Yahoo and MSN both working including AIM/ICQ. Also regarding roster size we are not limiting the number of contacts there. MobJab server would send all the contacts in the roster to the mobile handset. Eventually it would depend on the mobile handset if its capable enough to handle all the contacts or not.