I use my tags as project names. In typical fashion (and GTD-style) the projects/tags are named after what would be the successful outcome.
when i'm entering tags for a given task though (in the right-hand box with the task properties), i can't always remember the starting words. Did I use 'buy' or did I use 'get' for that tag? Since autocomplete only works starting from the beginning of a tag, if I can't remember exactly how the tag starts, autocomplete can't help.
What I *CAN* remember is that it involves a coffee table. So my suggestion would be that the autocomplete searches the whole tag.
e.g. if I type 'coffee', autocomplete suggests
Posted at 6:11am on March 1, 2010