About half an hour ago (May 25th, 16:21), a friend in Xianyang Shaanxi told me that there was another quake, and all the people ran out of the buildings. Then I checked the SINA.com and saw there were another "aftershock" in west of Sichuan.
Now, the "Wenchuan Earthquake" had caused 62,664 deaths as of 12:00 AM. Sunday. The "aftershock", or even another major quake is just like a "fuel to the flames".
As far as I know, this "aftershock" is located in Qingzhou (via this Chinese page of SINA.com), I will update some news from my friends then. Good luck to the Sichuan people!
Until now, still no English updates for this aftershock as far as I know. Maybe there would be some from english.sina.com.
Update: This aftershock caused one more death and 260+ injuries, including 24 severe injuries.

http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/us2008slat.php
see it
Earthquake Details
Magnitude
5.8
Date-Time
Sunday, May 25, 2008 at 08:21:48 UTC
Sunday, May 25, 2008 at 04:21:48 PM at epicenter
Time of Earthquake in other Time Zones
Location
32.577°N, 105.456°E
Depth
10 km (6.2 miles) set by location program
Region
SICHUAN-GANSU BORDER REGION, CHINA
Distances
40 km (25 miles) WNW of Guangyuan, Sichuan, China
140 km (85 miles) NNE of Mianyang, Sichuan, China
350 km (215 miles) NNW of Chongqing, Chongqing, China
1275 km (790 miles) SW of BEIJING, Beijing, China
Location Uncertainty
horizontal +/- 4.2 km (2.6 miles); depth fixed by location program
Parameters
NST=118, Nph=118, Dmin=>999 km, Rmss=0.78 sec, Gp= 65°,
M-type=moment magnitude (Mw), Version=7
Source
USGS NEIC (WDCS-D)
Event ID
us2008slat
Thanks for your information.
Yeah, when the quake took place, I was doing some translation. A pile of my books shook terribly, but I was extermely calm as I have already got accustomed to the harassment of quakes. Anyway, everyone shall take careful of himself in those dreadful days.
Hope there will be no more death.
This quake will release energy and prevent prospective huge quake.
Actually I don't know that whether little shock will prevent big shock. Anyway, we need to think twice carefully for this quake from now on. Chinese people have to know something.
I think it's more possible to be an aftershock. However, this one does topple a lot of buildings in disaster area.
Threre are some English report made by NewYork times.
http://www.nytimes.com/2008/05/26/world/asia/26quake.html?hp
And you may also reach more on the English site of Xinhua news agency.
Dear all, please, is there any way of getting some news of a Brazilian voluntary who went to Wenchuan, Sichuan to help people there? I'm writing from Brazil and, since the communication is out, we're too worried.
a group or a single person himself/herself?
What's the name? If you can provide some further information, I may help you ask my friends in Chengdu, where is not far form Wenchuan county.
Dear all,
Please, help me on informing if there is any way of getting some news of a Brazilian Voluntary who went to Wenchuan, Sichuan to help people there. I'm writing from Brazil and, since the communication is out, we're too worried about the news got from internet.
[...] Another update: We got some comments saying that there’s a Brazilian Voluntary went to Wenchuan, but their families/friends had lost touch with them. If you have any information, please drop a comment in this post. [...]