Your buy and hold strategy is very sound. The only thing I would consider is some diversification. Anything can happen to one company, remember all those people that had their money in that wonderful company they worked for — Enron.
Absolutely!
The primary reason we've gotten involved in Bogleheads in the past few years is that they seem to have a reasonable approach to diversification. Over the next few years my husband and I will be moving to mostly index funds. I stopped working in '99 and I'm trying to get my husband to retire (he will be 60 this summer). All the more reason to be diversified!