phranque - 10:11 am on Mar 14, 2013 (gmt 0)
welcome to WebmasterWorld, millercia!
last i heard google will crawl and index urls well over 1000 characters.
... but that doesn't mean that it's a good practice :-).
i would limit it to a url length that is readable in a search result which would probably give you better click-through.
make all the filenames lower case.
lose the underscores and use hyphens for word separators.