I got my first RPi from Newark about five months ago, and it only took 3-4 business days to show up after I placed my order (and their customer service people called me on the phone to make sure I got it! Talk about high-touch, B2B). I just ordered another 512KB RPi from Adafruit, slightly more expensive, but better selection of cases / breakout cables / etc., and they shipped less than 12 hours after I placed the order...
I ordered mine three days after they were released and it arrived a little over nine months later from RS. My cousin ordered three months after I did from the same place and got his in a few weeks. It seems like some orders are slipping through the cracks.
I placed my order, heard nothing for 4 months, then all of the sudden got a shipping notice and it showed up two days later. All I know is they're shipping them as fast as they get them.
If it's been a while, why not drop their customer service a note and ask for an update? If you're polite I doubt they'll begrudge you that.
EDIT: Also ordered from Allied in the US (California)
There's certainly a bias in the shipping thread, but you can find plenty of folks having issues!
http://www.raspberrypi.org/phpBB3/viewforum.php?f=23