[Wine] Quick question about installing Wine.

[DSpider]

I'm running Debian Etch and after runing:


Code:
sudo wget http://wine.budgetdedicated.com/apt/sources.list.d/etch.list -O /etc/apt/sources.list.d/winehq.list


just like it says here (http://winehq.org/site/download-deb) and then runing:


Code:
sudo apt-get update 



It says:

[...]

Hit http://ftp.ro.debian.org etch/main Sources
Hit http://ftp.ro.debian.org etch/non-free Sources
Hit http://ftp.ro.debian.org etch/contrib Sources
Fetched 61.4kB in 0s (71.5kB/s)
Reading package lists... Done
W: GPG error: http://wine.budgetdedicated.com etch Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 58403026387EE263
W: You may want to run apt-get update to correct these problems


What public key ??  [Question]