Recently I stumbled upon sshfs. And this is really the best thing since sliced bread. sshfs allows you to mount a directory over sftp (of course, under Linux). Since it relies on sftp, you can mount remote directories as soon as you have an ssh access, without the need to set up further servers or using vpn or anything.
Being able to access remote files like normal files means that you can use any program to modify these files. For example, I have a small personal webspace which allows access only via sftp. This made updating quite ugly, because I couldn’t just rsync everything to the server. But with sshfs you just mount your webspace and do a “local” rsync between two directories - and you’re done. Amazing!
How about a small GPS-mouse sized device which bridges from bluetooth to wireless. Think about it. Almost every cell phone or PDA has built-in bluetooth, and a web-browser. But very few come with support for wireless.
Please, somebody build this baby and sell it for around 50€!
I’m amazed at what useful things you can find within gnome. I accidentally discovered this one, when I installed ubuntu on my old laptop the other week. baobab is a tool which summarizes and visualized filesystem usage. So when you’re wondering where all those gigabytes have gone, try this tool. It seems that baobab has migrated into gnome-utils, although I find the current gnome-utils homepage less informative than the (obsolete) original one.