AIG is essentially a trading stock that for the near term will have heavy volatility & fluctuations. The company has its fair share of troubling times ahead, that being said the downside risk on a longer term play with it is only about $2.oo & If one is willing to place a low loss treshold, w/ potential high return long term bet on it, it could pan out to be a good play, much like ELN a few years back when they tumbled under 4.oo from being over 25.oo back in 2005, to recover to 35 in June of '08. AIG is going to be preserved, but as a short term investment it is but a trade.
ACH - great battered stock, with potential grand returns, commodities (like aluminum in this case, will recove) it is also a China play & when the credit markets open back up a bit & a little more free spending can freely occur, I expect commodity prices in base metals to recover, that being said, look for moves on FCX/X/MT/ and any major base metal producer, a cheap one is TGB. Another good China play will be CNOA, it's more of a China Agriculture/Food company
As for DUSA, biotechs went sour so long ago, it's dead money in dead space. The biotech field is full of bleeder companies, which never make a dollar, & bleed thru all the funding they have. If a biotech had a viable revenue bearing product then there is some potential, but most are always in some layer of FDA trials.
Look at companies with viable products & holdings.
Good Luck