BTW, great answers guys. I loved the details on why you would call/fold.

Hand 1

I raised pre-flop, SB bet into me. I raised the flop and the BB value bets into me on the turn. Either he really liked that Ten or he's trapping. I figured the BB for 2 pair, straight or set, and who the #$*% knows what the SB has. Between the chance I'm drawing dead and a second player that I'm going to have to show the winning hand to and I decided to lay this one down.

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 6 handed) converter

UTG ($11.35)
Fnord ($50.85)
CO ($40.22)
Button ($28.35)
SB ($32.71)
BB ($42.10)

Preflop: Fnord is MP with J, A.
UTG folds, Fnord raises to $1.5, CO calls $1.50, Button folds, SB calls $1.25, BB calls $1.

Flop: ($6) J, 6, 8 (4 players)
SB bets $1, BB calls $1, Fnord raises to $5, CO folds, SB calls $4, BB calls $4.

Turn: ($21) T (3 players)
SB checks, BB bets $5, Fnord folds, SB calls $5.

River: ($31) K (2 players)
SB checks, BB bets $5, SB calls $5.

Final Pot: $41

Results in white below:
SB shows Js 5c (one pair, jacks).
BB shows 8d Ts (two pair, tens and eights).
Outcome: BB wins $41.

Hand 2
If he's got 2 pair, the pot is already big and I got outs. No way he puts me on a Jack kicker limping in from the SB. So, I figure he shows me a flush draw (he's probably capable of this semi-bluff) or weaker Ace often enough to make this call. Had to think about it for a bit and brace for the worst, but it worked out.

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 6 handed) converter

Button ($18.25)
Fnord ($24.50)
BB ($34.80)
UTG ($32.60)
MP ($41.21)
CO ($27.42)

Preflop: Fnord is SB with A, J.
UTG calls $0.50, MP calls $0.50, CO calls $0.50, Button folds, Fnord completes, BB checks.

Flop: ($2.50) 6, 2, A (5 players)
Fnord checks, BB checks, UTG checks, MP checks, CO bets $2, Fnord raises to $6, BB folds, UTG folds, MP folds, CO raises to $26.92 (All-In), Fnord calls $18 (All-In).

Turn: ($53.42) 6 (2 players, 2 all-in)

River: ($53.42) 3 (2 players, 2 all-in)

Final Pot: $53.42

Results in white below:
Fnord shows As Jc (two pair, aces and sixes).
CO shows 5d Ac (two pair, aces and sixes).
Outcome: Fnord wins $50.50. CO wins $2.92.

Hand 3

Simple pot odds. Anyone got a different line on this one?

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 5 handed) converter

UTG ($26.60)
Fnord ($31.05)
Button ($59.07)
SB ($22)
BB ($48.75)

Preflop: Fnord is CO with 9, A.
UTG folds, Fnord raises to $1.5, Button folds, SB calls $1.25, BB folds.

Flop: ($3.50) 2, 9, Q (2 players)
SB bets $1, Fnord raises to $3, SB calls $2.

Turn: ($9.50) K (2 players)
SB checks, Fnord checks.

River: ($9.50) 2 (2 players)
SB bets $2, Fnord calls $2.

Final Pot: $13.50

Results in white below:
SB shows Jd 8d (one pair, twos).
Fnord shows 9h Ah (two pair, nines and twos).
Outcome: Fnord wins $13.50.

Hand 4
Being out of position sucks. $6 was probably a little too much, but dang 96o from UTG?

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 4 handed) converter

Fnord ($29.40)
UTG ($30.75)
Button ($24.20)
SB ($34.05)

Preflop: Fnord is BB with Q, K.
UTG calls $0.50, Button folds, SB completes, Fnord checks.

Flop: ($1.50) 5, 8, Q (3 players)
SB checks, Fnord bets $2, UTG calls $2, SB folds.

Turn: ($5.50) 9 (2 players)
Fnord bets $4, UTG calls $4.

River: ($13.50) 7 (2 players)
Fnord checks, UTG bets $6, Fnord calls $6.

Final Pot: $25.50

Results in white below:
Fnord shows Qc Kh (one pair, queens).
UTG shows 6d 9h (straight, nine high).
Outcome: UTG wins $25.50.