Push Gmail not working anymore :o(

For the past 6 months i have had push gmail on my iphone by following the instructions here:

http://www.google.com/support/mobile/bin/answer.py?hl=en&answer=138740

For the past 2 days however i have been having massive trouble with GMAIL on my iphone. Mail is not pushing and when i delete and relink the account it wont even sync my inbox.

I have had to resort to the dreaded fetch for now and i was wondering if anyone else is having similar issues or knows what im doing wrong?

Thanks in advance folks!