GammaJosh wrote:

Can anybody recommend a favorite online X-Men reading order list? 

The Marvel Chronology Project comes to mind:

http://www.chronologyproject.com/index.htm

It's not 100% accurate or up-to-date, but it's pretty good.

My other recommendation would be to buy the X-Men: Official Index to the Marvel Universe TPB (and the upcoming Wolverine one). It's an incredible reference book.

Mike Hansen, The Geekiary & All Day Comics