What do you have planned?
List your planned projects here, so people will know what to expect from you. If you like, write a short description for your project.
Myself:
Post-Portal
Map-pack of three maps. In every new map, the world will change state in various ways.
After Post-Portal:
These Cold Concrete Walls (idea stage)
Expect the unexpected.
Test Subject #13:
A new portal singleplayer of 20ish maps, hopefully harder than the originals (progressive, first few are easy)
After Test Subject #13:
A loooong rest, just in time to play the official 'Portal 2'
Test Chamber 23. 2/3 puzzles are complete, then they will all get some polish and optimization, and tweaks. Portal-style puzzles mostly using components already used in Portal.
After that... I don't know.
Finishing Infomercial, and currently working on the map I have named Rapid_Dash (will change). Rapid WAS going to be a race against rising water, but as I made the puzzles more complex I decided it would be better to just make it a normal map. Expect it in about a week.
I am currently working on two unnamed maps:
The first map is a challenging chamber with a few new puzzle ideas, and a few old puzzles reworked into something fresh - hard to talk about this one much right now as I don't want to ruin anyones first play-through with too many details. This map will hopefully be posted as a WIP within the new week or so.
The second map is solved exclusively with Portal Tunneling. One of the three puzzles was going to be in the above mentioned map but with all the varied (and strong) opinions on the technique I thought it would best to place a series of tunneling puzzles in one map so players know what to expect when they download it.
Right now this map consists of three puzzles, with the easiest being the equivalent of Chamber 15's tunnel and the other two being much more difficult. To help alleviate any frustration from advanced-tunneling, the player cannot die in this map.
I'm working with gravity as a staple within puzzles. Effecting how items can be tossed, and float in mid air. I've also nailed down being able to change the direction of the gravity, in all 3d movements. I've also nailed down making each object to have its own gravity, so you might be able to jump higher than a cube for instance or many other things. Mainly all speed, its alot of entity's involved, but so far here is what i have:
http://forums.thinking.withportals.com/dload.php?action=file&file_id=106
My project is unnamed right now. A set of three maps. The first map is a pretty standard type test area, the second is a little more reaction-based, but fun. The third map is heavily puzzle-based. You can see the map progress in my sig.
After this set of maps is finished, I might play with the Crysis editor.
well you prolly heard of stations, well I plan on making 2 or three more maps for it, then Ill most likely move on to tf2 mapping.
station 3 will have so many different ways to die that you might want to suicide a few times just to see the different traps =].
station 4 is the second gauntlet, and will follow in the manner of station1 only much more difficult.
station 5 will be some sort of final boss fight / puzzle.
also theres a secret map that can be unlocked once all the clues have been found throughout the other levels.
btw has anyone found any clues yet?
Working on my november contest map and hoping I finish in time 
Some early screenshots of Snake_Pit, earlier called Rapid_Dash.
Note that my video card sucks, and the quality is crappy.
Posted as URLs for people with crappy internet.
http://img515.imageshack.us/img515/6342/portalsnakepitscreen01zx6.jpg
http://img135.imageshack.us/img135/5053/portalsnakepitscreen02mt1.jpg
http://img515.imageshack.us/img515/5505/portalsnakepitscreen03ph5.jpg
http://img135.imageshack.us/img135/249/portalsnakepitscreen04bh6.jpg
http://img515.imageshack.us/img515/9180/portalsnakepitscreen05gv7.jpg