In response to Dave 901...
Because this is the second time this has been posted, I just thought I'd say that there are several online sites that readily offer explanations for your geneaology question. I got the following from
http://www.aboutbibleprophesy.com:
"From Abraham to David, the genealogies of Matthew and Luke are almost the same, but from David on they are different. Some scholars suggest that this is because Matthew traces the legal descent of the house of David using only heirs to the throne, while Luke traces the complete line from Joseph to David."
As I believe you mentioned in your post, Matthew is written with an emphasis on Jesus' kingship, probably because the author's christology led him to identify Jesus with the king messiah. Thus it would make sense that he gives a line of kings for Jesus' geneaology to associate Jesus with the next "king."
There are other possible explanations as well, including that the passages are made up, just like the rest of the Bible

. It may interest you to do a quick online seach for biblical genealogies to read up on their nature, importance, why they aren't always every generation, and other pretty interesting stuff.
Jake
[This message has been edited by Jake22, 07-28-2003]