For a few days now, I've been mulling over a point raised by Spinksville in a blog post concerning the Dungeon Finder's impact on smaller servers. It was her contention that, although the Dungeon Finder makes getting 5-man runs faster and easier for people on underpopulated realms, the new tool was contributing (or likely to contribute) to the depopulation of realms without a lot of options for raiding. It's never been easier to gear up a character, she observed, and someone with a geared character is increasingly likely to want that toon raiding. However, smaller servers rarely field the array and depth of PuG raiding opportunities offered by larger realms. Her conclusion? "Being on a smaller server has never been less attractive for a casual player."
While I go back and forth on that point -- lots of people will just gear a toon for its own sake without necessarily planning to raid on it -- I don't think she's entirely wrong, and I also think the larger point concerning the Dungeon Finder's potential impact on server communities is probably accurate.