If you are starting from scratch, I highly recommend that, amongst other sites, you check out Bon on YouTube.
I first picked up on her when a few prominent Twitter users championed her spoof videos - which are pretty amusing, but in Thai on JaideeTV (though one is translated here on Thai101) - although cleverly Bon is using them to get attention and viewers at her YouTube channel, where I found some excellent and interesting videos for beginners.
She also has a recently established a blog (which has already racked up an impressive 5,000 + hits in March alone), a Facebook page and offers lessons over Skype - an excellent business, I'm sure.
All in all, worth a look if you're struggling to get into the basics.
(She's also made it to CNNGo too)
Here's an example, this is the first video lesson which gives some background and some (very) easy starting points.