This just in: your URL is too long.
Last night I saw a TV spot for overstock.com, which told me I could now find them at O.co. Which I suppose makes them nine characters more convenient. And that little move will probably net them a few million more visits. And, I also noticed, the LaQuinta hotels’ URL is lq.com, not laquintahotels.com. So take note people – if your URL is a mouthful, you may be missing out.