This is the boilerplate text I (generally) use to greet new users, as a member of the Wikipedia Welcoming Committee.
Most of the greeting is taken from User:Isomorphic's User:Isomorphic/newuser subpage.
Hi there. Welcome to Wikipedia. When you get a chance, drop us a note at [[Wikipedia:New user log]] to introduce yourself.
*You can sign your name on talk pages by using <nowiki>" ~~~ " for your username and " ~~~~ " </nowiki>for your username and a timestamp.
*The [[Wikipedia:Tutorial|Wikipedia Tutorial]] is a good easy-to-follow guide to editing Wikipedia.
*[[Wikipedia:Welcome, newcomers|Welcome]] is another good place to start.
*[[Wikipedia:How does one edit a page]] gives editing help.
*[[Wikipedia:Manual of Style]] gives formatting info.
*[[Wikipedia:Policies and guidelines]] tell about the principles we operate on. It's important, but don't try to read it all now.
*[[Wikipedia:Help]] covers a broad range of useful topics.
*[[Wikipedia:Village pump]] is a place to ask questions.
*[[Wikipedia:Show preview]] explains how to double-check your edits before saving.
You should also feel free to drop me a question on my [[User Talk:Ludraman|talk page]].
If you've got spare time, you should considir working on some of Wikipedia's open tasks.
{{msg:opentask}}
Happy editing, ~~~~