Rick Latona launched AEIOU.com a month or so ago, to provide a way for domainers to build natural search engine traffic to their 2nd-tier domains. (ie Domains that are built on strong commercial keywords, but that don't get substantial type-in traffic.)
As the vast majority of my domains fall into this category, I thought I'd give the service a spin. I plunked down $500 to have AEIOU build two websites for me, on cross-country-skis.com and ski-hats.com.
About 2 weeks later, the domains were active, and after about a month, cross-country-skis.com is now the top result on search.msn.com for the term "cross country skis". (It has bounced in and out of this position once or twice, so who knows how stable that position is at this point.)
At current traffic levels it would take about 6 years to pay off development costs, but given this initial success it may be worthwhile to build out more content so that the site ranks better over time.
So, if you have strong commercial 2-3 word domains with dashes that aren't monetizing well on type-in traffic, you might want to give AEIOU a try and see what happens.