Sounds good to me! As long as it falls within HubPages standards (which is not hard to do) then I don't forsee a problem....might actually be rather fruitful. For example, there is a side project that Nikki Sixx did called "58 - Diet for a New America" in 2000. However, there is so little information about it that it might as well have never happened. So, Hub away, my friend, have fun, I'm sure there will be someone out there that wants to know what you know!
Perhaps a good way to start is to pick a city and or state, or a band of your choice, and write a hub on them....Musical style, biography, etc. Perhaps include some pictures of the band, and a music clip or video, maybe even a "tour" chart (i.e. the dates, times, and locations they will be playing local venues). Many underground or small time bands are appreciative of any and all publicity, so they may even grant you an exclusive interview if you explain what you are about. If you would like a starting point, I have recently moved and would love to hear about bands or artists in the St. Paul/Minneapolis area of Minnesota!
Wow, that Woodstock 2009 Hub is definitely a good one. It's getting great search traffic because it's well-written, authoritative and based on a topic that gave you some room to rank. Nice work, Adam.
The great thing about writing on HubPages is that you can literally write on any topic, so if you like music, then by all means write about that. It's not so much what you write about, but how you write about it and what specific part of it you cover.
For instance, if you write about Guns 'n Roses, then it might be hard to rank and get traffic considering that there are like 50,000,000,000 other pieces of well-written about the same subject out there.
But, if you do a little bit of research and and come up with more niche topics like:
Reasons Why Guns 'n Roses Broke Up 10 Most Populsr Guns 'n Roses Songs And Lyrics History Of Axl Rose
...then you should be good.
Just make sure that they're filled with good content, informative and fun to read and you'll be just fine with your music Hubs.