I at least am having real problem with making Kontact and Kopete work with gMail and gTalk.
I know this are known bugs and will be fixed, but it would still be nice that when installation ask you for your personal information it should also ask for email and which PM you use. So that it configure them during installation.
It's not that hard for gMail, hotmail, Yahoo or any major mail provider, but it might be the problem for smaller local providers.
But I think that the type and server of any email provider can be found on the internet (or am I wrong). So even if I would use some of my local email address it would still work.
I think it's possible but I'm not sure...
How is this managed in GNOME?
Also I haven't installed Ubuntu for quite some time now (I updated) so I'm not sure if this isn't already included...