I travel to Germany often and found that Boingo is the best service I've found for my needs. Boingo does not have an easy log-on program for N800 but with a little patience one can still use their service. Most hotels/airports have a log-on website with a drop down list of companies that one can select, there you will find Boingo (most of the time). Boingo has a flat monthly rate for unlimited use in States and Europe. You can also call and ask them if they provide service to the places you plan on visiting.
I found Minimo browser the best one to log-on to Boingo (Opera gave me problems).