They are located in these places:
Use root explorer, find the ones you don't want, rename them to "name.apk.bak" and your done.
Be careful in the system/app/ folder, it has important system files.
Also, I found this on hiapk:
我知~~~root了后,联通的垃圾软件在 /cust/unicom/cn/app 里面~~~~好似有2个app不能删~~~
If I understand it correctly, deleting the ChinaUnicomCustomize.apk and GPMS.apk, will cause problems. If someone can translate better, that would be great. BaiduSearch.apk also should not be deleted. It caused problems for me.
/cust/unicom/cn/app/ can also be accessed via download mode
Any questions, just ask. If you know of other places that have bloatware, let me know.
I suggest you uninstall a few, backup, uninstall, backup...repeat.
You never know what may be important!!!!