And how can I see the temperature of the card?

If you want a method without using scripts, you can just paste the following function into a cell
=LEFT((LEFT(RIGHT(IMPORTDATA("https://btc-e.com/api/2/btc_usd/ticker"),LEN(IMPORTDATA("https://btc-e.com/api/2/btc_usd/ticker"))-(SEARCH("last",IMPORTDATA("https://btc-e.com/api/2/btc_usd/ticker"),"1")+5)),6)),SEARCH(",",(LEFT(RIGHT(IMPORTDATA("https://btc-e.com/api/2/btc_usd/ticker"),LEN(IMPORTDATA("https://btc-e.com/api/2/btc_usd/ticker"))-(SEARCH("last",IMPORTDATA("https://btc-e.com/api/2/btc_usd/ticker"),"1")+5)),14)),"1")-1)

Only thing is it doesn't have auto-refresh.

If you want to display the time when it was most recently updated, you can use the function below. Just make sure to set the cell to the date/time format of your choice using the number menu under format
=((LEFT(RIGHT(IMPORTDATA("https://btc-e.com/api/2/btc_usd/ticker"),LEN(IMPORTDATA("https://btc-e.com/api/2/btc_usd/ticker"))-(SEARCH("updated",IMPORTDATA("https://btc-e.com/api/2/btc_usd/ticker"),"1")+8)),"10"))/(60*60*24)+"1/1/1970")-(8/24)

Hey, mate.  No need for apologies, it's a good question.  I think with Excel, you could use get external data from web and just use the actual page to fetch the data from.  I think excel just looks at the webpage, breaks it into it's xpath data, and then uses that xpath data to import into the spreadsheet.

I'd have to verify, but I think that would be the way to go.  I'll test it at work and report back.

-Fuse

In Excel; Data->From Web->Address (http://bitcoincharts.com/)->Go
if Script Error popup comes up then click No
click black right-pointing arrow in yellow box to select the Market table
click Import
click OK

to manually refresh; Data->Refresh

to automatically refresh periodically; right click on table cell->Data Range Properties->Refresh every
enter number of minutes (I use 1)->OK