High Output Management by Andy Grove manager-tools.com has a bunch of good podcasts I ran across platohq.com which is building a site for people like yourself to get mentorship.

As more my own personal advice... Recognize that you will have to:

1. fire people you like.

2. give up the option to work directly on code

3. spend more times in meetings

4. budget time more carefully

5. be careful what you say (things get misinterpreted)

....

so much more

The skills that make you a good developer are only 20% of the skills needed to be a good manager.