Spain’s best websites:

I’m searching for links to Spain’s most popular websites for:

1) Message boards/forums, (travel, English teaching, etc…)
2) Rideshare (collection of ads/sites), where locals drive people to/from destinations in Europe for ridiciloulsy low prices, lower than public transportation.
3) English teaching job postings

Thanks.

One of the best for posting ads are http://www.segundamano.es The site is completely in Spanish though.

depends where you are in Spain but loquo is also good for many large cities - also mostly in Spanish http://madrid.loquo.com/en_us