Stacy Keibler tweeted this morning that she’ll be guest starring on Chuck this season, after giving us some clues yesterday. Ausiello has now confirmed that what most of us assumed, that she’ll play Greta in episode 4.03 (title TBA). She’ll take on the role after Olivia Munn and Isaiah Mustafa, joining the ranks of Greta-of-the-week in the reimagined Buy More …

Missed this over the weekend, but it’s a must watch! Ausiello from EW caught up with the cast of Chuck at the NBC TCA party Friday night. Up first is an interview with Zachary Levi talking about Olivia Munn’s guest spot, working with Isaiah Mustafa that day, and the new Buy More. After that comes Yvonne Strahovski being serenaded – …

Beginning Tuesday, August 3, NBC.com will increase the number of Chuck episodes available online at a given time from seven to nine. Just in time for marathoning before the season 4 premiere on September 20! You can find episodes from seasons 1 and 2 at theWB.com as well. Episodes are rotated on Mondays.

The Television Critics Association’s (TCA) annual ritual of meeting with network execs and talent is in full swing with yesterday being NBC’s day to present their new & returning shows to critics. Following a day of meetings, they cut loose with a party, attended by several members of the Chuck cast, including Zachary Levi, Yvonne Strahovski, Ryan McPartlin, Vik Sahay, …

Our Comic-Con 2010 coverage continues…we are proud to present the full Chuck panel, complete with Vik Sahay as Lady Gaga, downloadable to your iPod! If you missed part 1, please go back and watch it first — part 1 has way too many fun goodies to list here! Please note: spoiler warning for both parts of our Comic-Con coverage.

Part 1 of our Comic-Con 2010 coverage features: Mel, Liz, and Genevieve hosting on the scene, news, the NBC Wired party, Chuck panel stories, press room interviews, fan interviews, the Barenaked Ladies, and even a red carpet interview with the Old Spice Guy himself, Isaiah Mustafa! And if that’s not enough… Joshua Gomez is now on Twitter! Follow him at …

Finally, we get the other half of the best spy team around on Twitter. That’s right, Joshua Gomez is now aboard the 140-characters train. Follow him! See the complete list of Chuck peeps on Twitter here.

Cameras were clicking fast to keep up with Chuck during Comic Con, catching some awesome moments. Here are my favorites. Obviously this is just the tip of the iceberg when it comes to photos. We have tons in our Gallery alone. What are your favorites?

Today is the lovely Yvonne’s birthday, and we want to wish her all good things in the year to come. We’ve loved her Sarah Walker from day one and look forward to not only seeing more of Sarah, but more of Yvonne as she takes on new projects. Here’s to you, Yvonne!

Zachary Levi hits the big 3-0 this September, and fansite ZacharyLeviFan.com wants to help him do with a special tribute from fans. They’re collecting greetings, well wishes, poems, etc. for a scrapbook that will be sent to Zac. The deadline to participate is September 15. Head over to their site for additional details.