Just thought I'd take the time to mention a number of ways that you can stay updated with the ARG here at DarkUFO.
1) Obviously visit this page :)
2) We have a very large number of ARG Members in our ARG Specific Forum, with specific Group and Team discussions as well as polls and a splash of fun. This is the best place to hang out while we wait for the next update.
3) RSS Feeds: You can keep up to date via our RSS Feed for the ARG Only here.
4) Twitter Alerts: You can follow our "Tweets" on the whole site including the ARG here.
5) Latest Comments: In the right hand sidebar you can see the latest comments being posted by fellow ARGers (is that a word?) across all the threads on this page.
If you have any problems or suggestions please let me know in the comments.