The back end is done mainly with ColdFusion with a pinch of Java by a kewl coder ,and crazy friend Kentaro here in Tokyo. The Flash portion is done (or I should say reDone ;) ) by a guy named Tozaki from Karate Systems. He's into Rich Internet Applications.
I like the ease of moblogging, and the phone gets the GPS coordinates in 5 to 10 seconds. This is very acceptable, but have to tell whoever I'm with to 'hold on a sec while I get our position ...'. I haven't checked how the GPS coordinates work with short videos taken with the cell, but I would imagine it would be an external link. Currently when attaching GPS info to the photo, and preparing to email ... the phone will ask me if I want to add an URL. This URL points to a mapquest type of site of Tokyo done by Toyota. Maybe the video will include this URL.
Other ideas of the Visual Blog are to sort by date, time, proximity, and color. A professor from German who currently resides here has been 'moblogging' w/ GPS for about two years now. He's got a great resource of personal data that he can check by date, time, and proximity. And did a collage by color too. I keep urging him to share his personal experiments, but I think he's a little shy. Hopefully soon.
If you ever visit Tokyo please let me know, and we'll get you a phone to play around with!