To answer your question specificially.
Which is about Wi-Fi, not SSB, WiFi is popping up in harbours everywhere. Some of it is pay, some of it free with purchase. One guy, Bill Dietrich, goes to a cafe in Benner Bay, buys a Coke, and get's free wifi.You can also buy Marine kits that have:All-weather (+9 dBi) 31" Marine WiFi Antenna High Performance 802.11g Buffalo High Speed WiFi card(with built-in 100 mW amplifier) Hawking 500 mW amplifier 18' (5.4m) white low-loss cableMarine Deck or Rail Antenna MountAll parts, cables and connectors are included.What these kits get you is extended range, to the point that you can pick up a signal 1/2 to 1 mile away. And if it is unsecured, mooch off the signal. I am assuming you know this only works in harbour and close to land where a signal is available.You also mention weather info. You can get that with a Sony shortwave and OCEN software, and not have to by an expensive marine SSB radio. The Sony simply plugs into your audio jack on your computer, and the software decodes the signal. There is also portable HAM antenna's that you can by and erect only when needed. Metso and Kelli on Mico Verde did this. You can read about it at http://www.micoverde.com/docs/articles_wx.htmlAnother option in harbour is simply getting an unlocked GSM/GPRS PDA. I used mine the last time, and had the weatherfax emailed to my phone, which I IR'd to my laptop. I had to buy SIM's in some countries, but had GPRS in most places. You gotta have a quad band unlocked PDA or smart phone though.