I had tried this earlier while on vacation on ecuador. Just installed and tried it. Everything worked flawlessly for me that time except the ability to change the access point was still missing so I had to open the browser to change the accesspoint used by nokia messaging.
Back in Chile I removed the software and the account I was using while on vacation for testing. Then I created myself an account using my @ovi.com email as username in order to have everything nokia in the same place and this time I didn't get the SMS when registering, so I had to download the software from my mobile and figure out a way to configure my mobile correctly (which required entring an email address nokia messaging wasn't able to figure out so it asked me what to use, then I selected corporate using intellisync and netac4.vie.hosting.nokia.com as the intellisync server).
Once done with installing and configuring 9.04(34) on my n95, everything seems to be working fine. I've just found that when you set the accesspoint to "search for WLAN" sometimes it tries to connect while you're not looking and then next time you find the "Search for WLAN" dialog open, though that's exactly the behavior you'd expect.
Maybe a possible enhancement would be avoid presenting the dialog if the last used WLAN is still usable or if nokia messaging is in the background, though that's just a thought. What's a *must* is the setup application shouldn't create your main account on the messages folder even if it seems your phone can directly deal with it. A solution could be asking if one wants to create the account in the messages folder or in "nokia messaging"