I have sent in my 129F form in august 07 and received my recept I-797c shortly there after. We have now decided to marry in the Philippines shortly and file a 130. I keep seeing that once the 130 is received, I should file a 129 F in order to obtain a K3 and K4 for both my wife and two minor children. Can I not use the old 129 F to speed up the process or is that to logical.

I-129F is used for K-1 OR K-3, and cannot be converted from K-1 to K-3 upon marriage, it is abandoned and you start over by filing I-130.

Also I have seen many cases where CR-1 is taking slightly longer than K-3, You may consider not doing K-3. K-3 costs more, cannot work untill either having EAD or green-card, and has AOS ($1010) to deal with.

CR-1 provides a green-card upon entry, and has no AOS to deal with.

it's true, K1 cannot be converted to K3, but you might want to consult an expert (perhaps the USCIS help line or a lawyer) before abandoning the K1: afterall, the application was filed in complete honesty and you havn't done anything wrong

something to bear in mind: marriages in the Philippines are quite complicated: lots of paperwork! (I know from experience) certificate of no impediment required from the embassy in Manila, then pre-marriage conselling, then waiting 10 days for the marriage license, and then once you are married, you have to wait some weeks for it to be logged into a computer somewhere in Manila before you get the authenticated marriage certificate that USCIS will accept