Maybe a few years ago, but that's not a real problem any more. I've been using 64-bit exclusively for years and can't remember the last time I found a 32-bit only application. And even if I did, it can still run on 64-bit.
Personally i would upgrade to 64 bit straight away for the reasons given in this thread, but that is just me.
Join us on irc at #ubuntuforums. For web chat see here
If you believe everything you read, you better not read. ~ Japanese Proverb
Do not read newspapers on an empty stomach ~ Russian Proverb ~ BrunoLotse