Well, I've finally visited Bangkok's Immigration Office... and I must say, I'm impressed.
I'm currently staying in Thailand on a double entry tourist visa that I obtained in Laos back in November, but one of the stipulations of using that to get a full six months in the country is that you apply for a 30 day extension after 60 days per entry. Naturally, it costs another 1,900 baht just for this 30 days... making the cost of living in Thailand on a tourist visa around 6,000 baht for six months.
But remember: that doesn't include travel costs to get the visa to start with, nor the cost of the border run to activate the second entry.
Anyway, the process of extending the visa was remarkably simple: show up in the highly impressive and ridiculously huge government complex not too far from Bang Khen (about a fifteen minute taxi ride from Sripitum University if you're around Phohon Yothin Road), and make your way to the building in the very back of the complex. Once inside, go to the second floor and look for the signs pointing to the immigration bureau. If memory serves, it's behind you once you're up the escalator if you go into the main entrance.
You'll need a passport picture, a copy of your passport (and visa(s)), 1,900 baht, and a smile. Remember, the agents can pretty much do whatever they want... your job is to not make them want to deny you an extension. Haha
You can get passport photos and copies of your passport on the ground floor (near the building's entrance)... 4 pictures and copies of all pertinent pages of your passport for 100 baht. Not bad considering I forgot to bring mine.
After that, it's easy. Fill out the form the nice ladies at the information desk in the immigration office give you, following the examples that are clearly posted right where you fill out the form. It reinforces the fact that this process, however easy, is a formality to get another 1,900 baht out of you.
Let the ladies check your form, and then you'll be directed into another large room. One of the security officers will check your form and your passport and give you a queue number. For visa extensions, you'll wait right around the corner from these security officers. There are signs clearly marking which area is for which service.
Once called, hand in your form, passport, and money to the agent, wait about ten or fifteen minutes, and they'll call you again with your newly extended visa in your passport. In total, not counting the taxi ride, the whole process took me less than an hour.
I must say, I'm highly impressed with the efficiency of the whole process. It's not something I would expect from a Thai government office, and the process is far more efficient than getting a passport or similar document in the States! The building the office is hosted in is highly impressive too; I don't know I've been in many buildings that are more massive. Nice.
Of course, it's off to Cambodia for a border run in less than a month, but hey... to live in paradise, you've just gotta do what you gotta do.