Nicotine is too resource hungry, and runs only on the local computer (N900 in this case).

Instead you want to run the client (which does the networking and traffic) on a computer with more resources which runs 24/7 on a good connection to which you can connect to with a client such as N900.

Therefore, use museekd with a client instead. For example, museekd + ssh + screen + mucous or museekd + museeq (Qt) or museekd + murmur (GTK+). Homepage of these projects is http://www.museek-plus.org

PS: iPhoneOS has mewseek (pro).