Vurg is right l-l-l are more popular and only time will tell if my prediction comes true. Chances are it won't. Still, for me, I'd rather have a true 4 character domain than a 5 character knockoff of a 3 character domain and I'm thinking someday others will feel the same. I'm not abandoning the 4 character ship yet. For me, I could care less about about which letter is premium in what country, whether numbers or dashes are valuable or not, whether y is a consonant or vowel. I'm just hanging onto the simple fact that less is more and 4 digits is second only to 3. Besides, some of my highest earning parked domains are words like R-ue, inn9, p-ow, etc., I'm earning more on them than most of my random but premium 4 letters. I don't know...maybe my thinking is backwards (or I'm just cheap) but at this point in the game I'd prefer buying something like s-ly for $7 than s-l-y for a few hundred.
PS Back to pricing on this thread. I've made a very rough pricing guide and posted it on the front of my website for people to tear apart. Feel free to PM me with any corrections.