Most of the tweets I see about WiFi on the rails (and there are quite a few) are positive. But Innismir shows not everybody's happy.

Mass. High Tech reports on Openairboston, the non-profit trying to build a citywide public WiFi network.

The effort initially focused on traditional wireless access points (like the ones you can see on lightpoles all over Brookline), but organizers realized that would prove impossibly expensive and so are now using a "mesh" approach, in which each subscriber's computer is essentially equipped to act as an access point through a cheapo router. The result: Free WiFi in parts of the Fenway.

Worcester Line experiment a success, so the T now plans to equip up to 258 of its 410 coaches with WiFi, with at least two cars on every single train WiFi enabled by this spring, T officials said this morning. WiFi cars will have a special logo slapped on them.

Here's a good reason to secure your wireless internet. Hari Balakrishnan and Samuel Madden have been helping themselves to your WiFi to collect traffic data, a lucrative commercial field. They've been doing it for more than a year, rather than pay for internet connectivity like everyone else.

The MBTA is equipping 11 ferry boats with WiFi.

Well, Grove Hall and Dudley Square, at any rate: $9.95 a month for wireless access, in the first phase of Tom Menino's citywide wireless effort.

I'm typing this while waiting for a burrito at DeNo's on Centre Street. Lord only knows why a pizza place offers free WiFi, and yes, I'm a nerdgeek for bringing a laptop to a pizza place (hey, I'm just getting back from a computer conference at the Expo Center), but I don't care: It's molto cool.

David Weinberger is sitting in the Brookline High School auditorium when he discovers why Brookline's municipal wireless system is awful - not only isn't it free, you have to sign up for a monthly plan, which makes it useless for visitors or people who just need to get on for an hour because, oh, they're sitting in the Brookline High School auditorium.

Steve Sherlock posts his experiences direct from the train when he lucks out and gets on one of the cars that actually has it.

... For a free service, occasional access to email will be helpful and beneficial. I won't plan on getting any real work done at this connection strength. ...

Jeff Egnaczyk is on the 7:40 train out of Back Bay. Come in, Jeff, can you hear us?

I only have two bars. I'm thinking the WiFi is in another car. It's kind of slow. I think I'm in Newton right now.