The only place that comes to mind is actionscript.org – its been a while since I’ve checked it out but they do have a tutorials section. To my knowledge there’s nothing of the same calibre as psdtuts.com for flash.

lynda.com?

A great place where I learned a lot about Flash was http://www.kirupa.com/developer/flash/index.htm . They have lots of tutuorials (although not as pretty as PSD Tuts). Another great way to find a tutorial you want is by doing a google search and just sifting through the options that way, sometimes you can find the tutorial you want through Adobe directly.