For anyone that hasn't yet seen this wonderful online Tanks/Worms clone then go here: http://www.gunbound.com and http://www.gunbound-hq.com
It's one of those games that just EATS your time. I started playing it about a week ago and I'm already totally addicted. Seriously, just try it.
If you're interested my nick on Gunbound is also Spottedkitty.