Solutions is one of the biggest development changes in CRM 2011 and it will take a little bit of time for people switching from CRM 4 to CRM 2011 some time to get their heads around it.
When you do you will find it is a massive improvement not only in terms of keeping only the changes you have made in a seperate solution but most importantly it’s a huge improvement in deploying CRM 2011.
Richard Knudson who is one of the leading CRM bloggers has written an introduction to Solutions and like most of his articles it’s is excellently written. You can read it here
if you prefer to learn by watching videos then the channel 9 series is probably the best ones I watched on the subject and they are by David Yack so you are in very good hands
Solutions – Introduction
Solutions – Managed & UnManaged
Solutions – Publishing