http://headlines.yahoo.co.jp/hl?a=20070105-00000011-rcdc-cn

I wish I was able to find a Chinese article, but I can't read Chinese.

A Chinese "kofun/burial mound group" has been found at the bottom of a lake in Fujian Province. Apparently, while doing maintanance work on a dam, the tomb group was spotted as the water level was being lowered. What do you guys know about this/make of it? Is this big in Chinese news?

I searched around some more and found the following page which has more pictures: http://www.recordchina.com/group.php?groupid=4842

Anyone?

Without knowing anything about it I wouldn't see any reason on the face of it to be big news.
There are countless tombs all over China, being dug up accidently, or looted, or professionally researched and some of these are much more ancient.
That one above was covered in a dammed waterway and then uncovered & is not going to create a sensation in itself (tens of thousands of ancient sites sites were buried in the Three Gorges Dam project waters).
If they open it and there is something astounding in there you might hear more, like the Arc of the Convenant for example.
From the picture it looks like quite a late dynasty style tomb, of a fashion even quite recently used (when space for burial was availible). In this way there isn't likely to be any great scientific interest.
Chinese (traditionally) like to have graves on a slope and overlooking water.
Likely this was the crest of a hill used for burial & geomantic reasons, then flooded by rising waters. It is a pretty common looking type.

As a side note in Taiwan they have old graves like this, but now there are high-rise buildings made to hold the ashes of the recently dead since cremation is the way to save space. Like apartment blocks with niches full of human ash. There is a block in view from where the Taipei national museum is. These are called Public columbaria.
In China space is also a premium in the cities, although the rural folk still get buried under little mounds even in the middle of the fields they are farming, and the funerary items sit atop the mounds that show they are new even though just like ancient mounds otherwise.
If the rural folk have a good hilly outlook then such a ideal grave may still be made like your picture but for most the 500 million urban Chinese the traditional & desirable type of burial such as revealed by these receeding waters is no longer an option.
Graves now need to make way for space for the living and not take up prime real estate, unfortunately.
This late dynasty grave here has in the same way come into conflict with the modern world.

Thanks for replying to my post! I was feeling a bit lonely

Many of the tombs you mentioned came up in my searches for this one--cool stuff.