Unfortunately I am not very familiar with Korean tea and teaware, or for the matter anything else from that country. I may have unknowingly bypassed some great stuff from there over the last few years. Although the following comments aren't strictly tea-related, I think they're somewhat relevant since many of us, as we get deeper into tea culture, also expand into other related areas like Asian art.
Due to recent unemployment and the drop of the dollar, I've pulled way back on my purchases from Japan. On the other hand and with a couple of exceptions, buying from China doesn't always mean saving money. Their quality items are still expensive. Many of their other items are so poor in quality that what seems like a good deal isn't when you end up replacing the items with something better because of poor manufacturing and quality standards.
I recently made my first purchases from South Korea and I am very pleased with the service, quality, and products. I replaced some good Chinese paintings mounted on super-low-quality scrolls with much higher quality Korean scrolls hich actually cost less than the Chinese ones. On the Korean scrolls the fabric is much nicer, the hanging cords are of very superior quality, and they use real wood rods instead of cheap plastic ones. All of this came at a price that was the same or cheaper than their Chinese equivalents.
I also have completed most of my Christmas shopping and it was from these same Korean vendors. I usually get my Christmas gifts from Japan and they have been very polular with the recipients. This year I didn't want to spend as much as in previous years, but I also didn't want to give people junk for Christmas. I found some awesome mother of pearl items form Korea that are actually made in that country but are offered at prices that seem to good to be true. I have received my first two orders and my opinion is this: these South Korean products and vendors are offering Japanese quality and service at the prices we expect to pay for mainland Chinese products. To me, this is the ultimate deal.
Here's the links to the two vendors I've used. Their teaware is very limited, but their other items may be of interest to some forum members. My sister liked the mother of pearl items so much she had me pick up a few for her to give as gifts to her friends. Most items look significantly better than the pictures as the MOP effects must be difficult to capture on film.
http://stores.ebay.com/LUVOD
http://stores.ebay.com/Antique-Alive
Edit: The dealer Luvod has a smaller selection but is supported by the capital city of Seoul. The city actually guarantees your satisfaction. The prices from Luvod can be significantly lower, especially during their sales. Most of what I purchased from them was discounted one third AND shipping was included in the discounted prices.
Luvod also offers custom mother of pearl designs to their customers for a modest one-time fee. I won't quote the fee here because it is so low I suspect it may be a mistake. I have asked for confirmation of the price, as I am considering submitting a custom design to be manufactured. Maybe an ancient Chinese green dragon on a white mother of pearl background adorning a chrome cigaretter case.
I would not hesitate to use either vendor, but the special deals from Luvod, along with the lack of shipping fees, has saved me a lot of money on my Christmas shopping. Both vendors have great customer feedback.