Invasions still can be triggered by completing the Lady Grey TF. I believe the way it works is if it's an all-Hero team, one random Hero-side zone gets invaded, if it's an all-Villain team, one random Rogue Isles zone gets invaded, and if it's a mixed team, one random zone from either side gets invaded. (It might be one of each, I'm not sure.)
As for scheduled invasions, I don't think there's any more planned for 2009. The Winter event should keep us all busy enough. :P
If you are looking for calendars.. I've been making them for CoH every month since the official ones ended last year and including them in my sig.
Master-Blade's CoH Calendars
I'm currently up to February 2010.
Unfortunately, I can't tell you when the official game events like Rikti Invasions or 2xp weekends are going to be. I wish I could. I don't know of any other place where they were listed other than the forum's News and Announcement section right before they go live... and they don't usually give you much notice there. haha
I use the calendars to schedule my weekly TF runs with large groups of people. They print perfectly on a standard sheet of paper. I also use them as my Windows Desktop (set to Center so they don't stretch). Just change your Desktop background color to anything you like so you can customize the "border" yourself.
Does anyone have and new or foreshadowing of the next sceduled Rikti Invasion? I did a search but did see any recent news. Will there be another calandar for 2010 that might have that listed? Do the Invasions still happen randomly in game?
I have a few characters I want to get the Accolade and costume pieces unlocked.
Thanks,
Zhin