Congratz...i just passed 70-450 this morning as well. Nice to finally get up to MCITP!
Congrats to you also, the MCITP was my primary goal ever since I became a DBA back in Jan last year and after failing it the first time round I was determined to pass this time.
I'd definitely recommend to anyone studying for 70-450 to set up a dedicated SQL Server test environment with at least 2 servers that will allow you to play around and actually practice setting up things like replication, mirroring, log shipping, distributed transactions etc. A theoretical knowledge is all well and good but nothing is as good as a solid working knowledge of those technologies and the various situations to which they apply (plus you can re-use the testing environment for future projects afterwards).
Next exam for me will be 70-433 (SQL 2008 DB Development) - best get studying again I guess!! :-D
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