My raid group is currently desperate for a healer on Silver Hand, Alliance side. We raid Fridays from 7:00-10:00 pacific and on Sundays from 4:00 to 7:00 pacific. We're currently only 4/6 in normal MSV and 1/6 in normal HoF, but that's mostly due to lacking a consistent group from week to week. We are part of a raid organization on Silver Hand that runs upwards of 50 raids per week, so there are plenty of opportunities to run alts or run with other groups on weeks you can't make our raids. It's a fantastic community with a chat channel full of active players who are always willing to help out with crafting, questing, pugging world bosses, etc. My specific raid group consists of mostly guild members, but being in the guild is not a requirement at all. You would certainly be free to join our guild, if you like.
We're always looking for DPS and tanks as well, so even if you aren't a healer, feel free to read the additional details and post with any questions/comments.
You would be required to join the Leftovers raiding community in order to sign up for raids through our calendar system and to track your raid points. You can read all about the points system on the web site. It's a pretty straightforward system. You earn 1 point for every 15 minutes of raid time (so an average of 12 points for a 3 hour raid). When loot drops, bids are taken. There are three types of bids: Shroud, Standard, and Save. Shroud bids are awarded to the bidder with the most points and cost that person half of their total points. Standard bids go to a roll-off and cost the winner 10 points. Save bids go to roll-off and cost the winner 10 points (basically a Standard bid with a built-in "pass" to someone who wants it more). Points are shared across all of Leftovers, so if you raid with one group, you can spend points with another group, allowing you a lot of flexibility in scheduling.
The various groups that raid within Leftovers are called "Charters". The charter I run with that is currently recruiting is called "Wanderlust" and raids at the times I specified above. Most of the Wanderlust raiders are members of my guild, Any Port in a Storm. As I said before, membership in the guild isn't required, though we'd be more than happy to have you!