My investments go like this: 50% Bitcoin, 30%Litecoin, 20% Silver/Copper/Other metals & investments. I also have a handfull of PPC, but I'm not willing to invest much more than my few bitcoin worth. I feel like it is TOO risky. There is high risk in all p2p currencies. One law passed, MtGox gets hacked, etc...etc... and the price could crash without ever really going up again. Really, the safest investment you can make right now is pizza & beer. You should see my nestegg of that spilling over my belt 
I'm holding 80% LTC 20% BTC.
ASICMiner's company should be going live with ASICs on the bitcoin network by the first or second week of January, representing some 20-30 TH/s increase in the network. However, we should be aware that large scale operations like ASICminer need to dump the BTC they mine into the market to realize USD/EUR profit, in which case I think we'll see crazy BTC volatility in the near future. As opposed to this, anyone wanting to mine with video cards will have no choice but to move to the litecoin network and the hash rate will skyrocket.
The future is bright for litecoin if you're willing to be patient.
Think about it this way: the BTC network before block halving was about 35 TH/s, of which probably 95% was video cards. Let's say a little less than half of those GPU miners come to the litecoin network, adding a conservative 15 GH/s. That would bring the network difficulty up to nearly 500, an order of magnitude or more.