On the forums I have been hearing a lot of anti-James Gunn comments. Yes, we all know John Krasinski is a lot cuter than James Gunn and yes, it would be very cute if John and Jenna were indeed dating. But in reality James and Jenna have been together for a long time and it would be unrealistic to have hopes that Jenna will divorce the dork an go for the hunk.
James Gunn and Jenna Fischer have been happily married since fall of 2000, about a year before Jenna even started working with John. I think what most people are missing here is that actors DO have lives other than the lives in their hit roles.
Jenna Fischer met James Gunn through her life-long freind Sean Gunn and the story was very Jim/Pam like. John Krasinski may be single, but if wanted to find a girlfriend I'm sure he would have no problem at all.
Hope this article didn't ruin any dreams you had for Jenna and John, but anything is possible. I would be just as excited as anyone else who reads this if Jenna and John were going out...I'm just saying its very unlikely.
P.S.- If someone like James Gunn can get someone like Jenna Fischer, he has to be doing something right.