Hiya!
The bus thing depends on where you work. I'm an IP, so I work at Epcot. It takes us about 25 mins to get to work, including the obligatory, (uggggh,) stop at Vista.
Buses run to Wal-Mart every day except Sunday. On Wednesday and Saturday they run during the day, the other days from 3pm til about 2am. It runs once an hour, which makes it bloody impossible to ever plan a "quick trip" to Wal-Mart! And missing the bus back to housing is enough to put you in the most foul, "I can't believe I'm stuck at WAL-MART" mood of your life!
The AK and MGM buses run every half-hour. Epcot runs on the half-hour early morning and then every 25 mins until about 11pm. Not sure about the MK bus or the buses that go to resorts and Typhoon Lagoon. I think the TL bus is rather infrequent.
The new bus service is nice, but the drivers won't let us stand-up! It's SUCH a bother, especially when trying to get to work for 11 - 11:30, as that's when the World Showcase opens and when sooo many castmembers need to get to work.
However, the bus drivers will let us stand on the bus on the way to and home from PI despite the fact some of us can barely stand properly in the parking lot let alone on a moving bus!
~ Jen