Perhaps they are just busy with projects. I hope you can get your 'decert' tool guys. Be patient. 

Instructions for de-certing if you're experiencing problems
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Edit 19.05.2003: Dutch users may find this link helpful:
http://www.developers.orange.com/forums/sh...php?threadid=22
Thanks to Martin for the tip.
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Edit 23.04.2003: A (seemingly) UK-specific update from fozzie here:

Decert site can now be found here
http://developer.orangews.com/orgspv/comdef.aspx
So all you UK-types that have been having problems: give this a try.
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This guide was mainly written for those who've been having problems with getting the official de-cert process to go through; I'm not especially an expert, the hints posted here are simply the best results of a lot of my trial-and-error attempts to get a couple of SPVs de-certed 
Note: It may be necessary to establish a GPRS connection before you start trying this de-cert process - Action Register needs to make a short data call to register with Orange's SPV-database, I assume, and it doesn't always do this on it's own. Be sure to establish a new GPRS connection after you've done with the de-cert process.
First of all, disable any popup stopper apps you have running. If you're using Norton Internet Security, temporarily disable this too.
Go to the normal Orange Official De-cert link.
When asked for your details, try typing the number in this format:
+45[space]xxxxxxxx
Type your IMEI in the appropriate field.
Press OK.
If you get the error, go to the phone number field, type in some text nonsense, do the same in the IMEI field.
Press OK.
You'll get taken to a page where you can download a registration app (Action Register) to your SPV. On this page you'll need to type in your phone number in the format:
        +xx[space]xxxxxxx
Do this and then run Action Register, following the instructions on the above page. 
N.B. It seems that there are some inconsistencies with the format of the telephone number required by Action Register - it may be that you don't need to type the country-code at all as this seems to get added automatically. Obvious, really, though I used the country code on my own SPV and the process went through OK.
Action Register should then report "Phone registered"
Go online via GPRS to any webpage.  <- Thanks to Torben for this
Next, back to the de-cert page, type the phone number, not forgetting the space, and make sure it's exactly the same as the one you typed on the previous page!
Type in your SPV's IMEI; it's written on a sticker on the side of the Orange packaging, on the receipt and you can also get it by typing *#06# on your SPV.
Press [OK], et voilà - it goes through! You should get a confirmation sent to your SPV within a minute or so. This confirmation means that your SPV is *definitely* no longer application-locked. Ace   
Now you can restart your popup stopper app and get to work configuring your NIS settings properly
If the above doesn't work for you within 5 minutes, try again - check that *all* the phone numbers you type in are the same.
Once you've done the above, you'll *not* need to use this method again to de-cert, for example when you hard reset or install an update. After completing the above, the phone will be registered with Orange and the de-cert page will work properly every time thereafter.
EDIT: Easier to read, more precise & Torben's correction. GPRS tip. Number format request. Title change, the problems don't only occur in Denmark.