It’s amazing to see that Java2Script’s Google Talk get run on Opera Mini 4 inside a mobile phone.
Here is Opera Mini 4′s simulator for you to test its CSS/JavaScript/AJAX compatibilities:
http://www.operamini.com/beta/simulator/
Here are screenshots:

Zoom in to get a clear look:

Login and connect:

Now we are in:

Zoom in to get a clear look on friend list:

But Java2Script Gtalk does not get run as totally correct. It fails to maintain normal connection back to Gtalk proxy server. So after a few seconds, the proxy server closes the connection. Maybe Java2Script Gtalk may fix this problem later. And also I think Opera Mini team may improve its AJAX supports in the near future so nothing need to be modified.
they either need an account on the vpn endpoint (firewall or router) or in your domain, if it’s the domain account you need to set up your vpn endpoint to use radius to authinticate. then you’ll need to make sure the laptops/pda’s have the cisco vpn client on them (free DL from cisco if you have a CCO account with them) unless your using the easy web vpn in which case on the vpn client you just need them to hit the website that your vpn endpoint hosts.