SharePoint explained very nicely and simply in this video tutorial:
Microsoft's main SharePoint related beginner sites
Check out the main SharePoint 2010 Website from Microsoft.
Then check out some success stories shared by Microsoft at iUseSharePoint.
Ramp up on SharePoint
To get started on SharePoint, you might want to take some formal SharePoint training. There is really no substitute for hands on training if you can afford the time and expense. I would recommend looking at the available classes here: http://www.criticalpathtraining.com
Can't travel or need on-demand training? I would recommended to start with this jump start page and watch some beginner video tutorials:
http://www.sharepoint-videos.com/sharepoint-easy-start/
Check out the EndUserSharePoint site for Lots of great articles produced by the SharePoint community:
https://www.nothingbutsharepoint.com/Pages/default.aspx
SharePoint environment for practice
To try out scenarios, create prototypes and demos, use the completely pre-built SharePoint environment created using CloudShare:
http://tinyurl.com/asifcloudshare. Here are some visuals on exactly what's in this cloud-based virtual machine: http://www.sharepoint-videos.com/pre-built-sharepoint-2010-demos-in-cloudshare/
OR
Deploy the whole virtual machine in your own environment (if you have the hardware available):
http://www.microsoft.com/en-us/download/details.aspx?displaylang=en&id=27417
SharePoint on-demand support
When working with SharePoint, you will have questions that you just want to go and ask someone. The best place to ask those questions is the SharePoint Forums: http://social.msdn.microsoft.com/Forums/en/category/sharepoint/. Microsoft employees and MVPs are often in the forums answering questions.
You can also find on-demand video tutorials on SharePoint-Videos.com for quick show-and-tell. Also, additional tutorials available on Microsoft's Channel 9 site: http://channel9.msdn.com/search?term=sharepoint
If you need immediate help with a project, look into hourly SharePoint remote consulting/mentoring: http://www.sharepoint-videos.com/remote-consulting/
Become part of the Bamboo Solutions community: http://community.bamboosolutions.com/
Consider picking up some SharePoint books as well:
SharePoint Certifications
There are a few certifications that exist for SharePoint as well. These will give you the credibility you need in your role. You can find them here: http://www.microsoft.com/learning/en/us/certification/cert-sharepoint-server.aspx
Customer Reviews for SharePoint Vendors
It's hard to decide which SharePoint vendor to go with when it comes to SharePoint consulting, training, products and other services. Check out the SharePoint Reviews site: http://www.sharepointreviews.com/