Post them here, so our community can keep track of them and discuss them, sort the ones that work from the ones that are obvious pump and dumps.

Some of this stuff can be highly profitable. We adviced short positions on

Orsus Xelent

• Time To Short Orsus Xelent? - Seeking Alpha
• $3.76 at the time of writing (Oct 2011)
• Company went bankrupt

Houston International (HUSA)

• Houston American Energy Priced for Perfection - Seeking Alpha
• Almost $20 at the time of writing, now a penny stock Jun 2013 (28 cents)

BroadVision (BVSN)

• BroadVision Defies Gravity, But It Can't Last - Seeking Alpha
• BroadVision: A Baudrillard Moment In The Stock Market - Seeking Alpha
• $50+ at the time of writing, now $9 (where we argued it should be)

China Infrastructure Investment Corporation (CIIC)

• China Infrastructure Investment Corporation: Shorting Seems A Good Option, But Not Without Risk - Seeking Alpha
• Shares at $1.09 at the time of writing (Sept 2011) Penny stock now (4 cents June 2013)

Xyratex

• Xyratex Has Gone Up Too Far, Too Fast - Seeking Alpha
• $12.49 at the time of writing (Oct 2011), still below that ($10.50) at June 2013

Not all of these were heavily promoted though. However, there is that saying "pump and dumb" that can work both ways, it can be profitable to ride the pump and/or the dumb.