The "perfect" Wikipedia article is built on solid research (remember to cite your sources). Contrary to popular belief, not all information is available for free on the Internet. Some research is only published in scientific journals and books (ask your library for remote lending services); some material is available only in commercial, password-protected electronic databases. If you have access to useful research material, please add the relevant information to Wikipedia:WikiProject Resource Exchange, a central portal to find Wikipedians with access to such resources. Remember we can only use facts from sources such as these, not a particular copyrighted expression thereof.
If you are a qualified user you can request access to the databases of paywalled resources proctored by The Wikipedia Library. Qualification usually involves having 500–1000 main namespace edits and 6–12 months tenure editing on Wikipedia.
The MediaWiki software that runs Wikipedia is under constant development. Do you want to see the latest, greatest features? Then head over to test.wikipedia.org, where the development branch is tested. But be careful. That wiki runs in debugging mode, so even the smallest problem in the code might cause it to spew out error messages. Take a look at the list of features under development in the MediaWiki roadmap. MediaWiki already is one of the most feature-rich wiki engines; see the MediaWiki feature list. MediaWiki and its dependencies are open source, so if you are the inquisitive type, please take a look at the code and help improve it.
