Starting Out - Looking For Plugin Suggestions

So, I'm hoping that being new to WPMU isn't going to be a negative for me but I'm sure it will be a challenge. I'm looking for a little advice to make our transition to MU an easy one.

We're looking to build a small community on the WPMU platform. We're specifically looking for the following features and I'd love to hear suggestions for the plugins we should use.

We're looking for the following:

- Profiles
- Avatars
- Video Upload
- Podcast Upload
- Galleries
- Calendars

These are the core features we're looking for and would love to hear from you on the best plugins to implement these features. Thanks in advance for the help.