If any one else on Lucid is getting errors like this when trying sudo apt-get update:
W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/lucid-getdeb/Release.gpg  Could not connect to archive.getdeb.net:80 ( - connect (113: No route to host)

W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/lucid-getdeb/apps/i18n/Translation-en_US.bz2  Unable to connect to archive.getdeb.net:http:

W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/lucid-getdeb/apps/binary-amd64/Packages.gz  Unable to connect to archive.getdeb.net:http:

E: Some index files failed to download, they have been ignored, or old ones used instead.
The workaround is this:
In terminal enter gksu gedit /etc/apt/sources.list.d/getdeb.list
then replace the contents with this:
deb http://mirrors.dotsrc.org/getdeb/ubuntu lucid-getdeb apps
deb-src http://mirrors.dotsrc.org/getdeb/ubuntu lucid-getdeb apps
I just replaced the first line as I didn't have the source line but, that is up to you.
Then enter sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com A8A515F046D7E7CF

Then enter sudo apt-get update to see if the error is gone.
I had been getting this error for the past couple of days. But, this fixed it for me.

If getting this error on another version of Ubuntu, just change lucid-getdeb to precise-getdeb or whatever suits your needs.
This even works on Linux Mint.
I hope this helps someone else with the same problem.