Oh for the other part of my spanish homework I'm using this great on-line verb conjugator, which lets you write a custom template, to only select certain info. So in my case, learning the (few) irregularities of the preterite tense, I use my own query which has customised results for just that conjugation. nice. Of course, I really want this tool in with a dictionary, and a phrase/idioms book. [Neill Zero]
Okay... I guess if you're not studying Spanish or living in Spain this might not be entirely useful to you. But it's seriously going on my top toolbar next to the Yahoo Spanish Dictionary.