I like website APIs. For example, I use the Flickr API to sync my photos to Flickr. Sidenote: syncing is very important and more things will start doing it automatically. But I can't do this when the Flickr API is buggy. Grrr!
Update: fixed by flickr!
Well, if they'd've written it in perl, they'd've had regression tests. No excuse.*
When you don't have regression tests, it's not perl, it's PERL