Some stuff you'll either want to know or need to know about Mass Effect 3. Spoiler stuff will have it's own section (spoilers will as of right now be minor).

- There's an automated fish feeder now. You can find it on the Citadel in the Presidium for 25,000 credits.
- Speaking of stores on the Citadel, it seems like you can't get discounts this time around. Also, you can buy stuff on the Normandy again, except it'll cost 10% more than it will on the Citadel (excluding gun upgrades)
- If you import a character from ME2, your level and most of your skills will carry over (the only ones that don't carry over is your Bonus Power and your passive class power)
- You can get your fish back, granting both they and Kelly survived your game. You can at one point find Kelly in one of the Docking areas, and she'll give you back your fish.
- In the same place you find Kelly, you can find a Shepard VI and interact with it.
- While you're getting your critter reunion going on, go to the area that was Jack's on the Normandy. Wait and keep close watch. Your hamster will eventually run out. Catch him, and you have your hamster back.
- Had plans to divvy up your N7 DLC with someone? Sorry to disappoint, but all that is one code.

SPOILERS:
- When EDI gains her robot body, sometime after you talk to her about Joker avoiding her questions, talk to her again and choose the option 'new body'. For added hilarity and awkwardness, choose it last

Will update when I can give more information.