How do people update their wallet balances for paper wallets?

[puck2]

Let's say I have a paper wallet under my mattress... How do I keep track of what its balance is? Couldn't I come back in a few years only to find out it has been cleaned out by some surreptitious snooper? 

[DeathAndTaxes]

keep a unprotected list of the public addresses and look the current balance up on blockchain.info.

More advanced solution is to make a "watching wallet" (contains only the public addresses so it can't spend coins).  Armory client and blockchain.info ewallet can both produce this.  I also believe there is a service somewhere which will monitor the value of an address.

[Panoramix]

I also believe there is a service somewhere which will monitor the value of an address.

I like http://btcbalance.net (not affiliated) to keep track of multiple read-only-addresses (up 'till 50, I believe), simple and easy to use.

[bitcoinspot.nl]

Yeah btcbalance is great for this purpose.

[b!z]

There is also a site similar to btcbalance but i forgot the name.

good luck.

[BobbyJo]

Armory does it for me.  Very swept up solution where you can monitor several wallets in the same window, checking balances of each.

[Bitznbitz]

You'll just have to keep it up in your computer brain.

[bg002h]

You'll just have to keep it up in your computer brain.

I wrote an app for iPhone to do it...

[MarkOST]

So that's why Armory is so popular. Guess Ill start to generate a few of my own.