Hi Mark,
I don't recall Nasm ever being packaged with gcc files. At least not from "here". 2.07 is good, but 2.08rc1 is available:
http://www.nasm.us/"downloads" will get you the "releases", including "release candidates". "snapshots" will get you the very latest builds. Generally, there's no reason not to get the very latest. Sure, there might be new bugs introduced, but there are probably old bugs fixed. On balance, there are probably fewer bugs in the newest versions - there might not have been any new bugs! :)
Currently, there's a bug in imul reg, reg, imm32... but only if you use the "-O" switch. A patch is being evaluated. Might want to wait for the next snapshot... (after 20091026)
Best,
Frank