I'm so happy there was no cap.
Intercasino is the only online site I've seen that removes the 4 bet cap when heads-up. It has worked to my benefit on multiple occasions 
This one happened today.
Game #83159554: Texas Hold'em Limit ($1/$2) - 2004/08/05 - 16:19:57 (EST)
Table "Amethysts" Seat 6 is the button.
Seat 1: Geor19087 ($80.25 in chips)
Seat 2: jonathon ($118.50 in chips)
Seat 3: Norbi14 ($62.50 in chips)
Seat 4: player98 ($36 in chips)
Seat 5: xenophon ($105.25 in chips)
Seat 6: Engek1 ($61.25 in chips)
Seat 7: zulu ($20 in chips)
Seat 8: hork42 ($69 in chips)
Seat 9: pokerluv ($28.50 in chips)
zulu: posts small blind $0.50
hork42: posts big blind $1
HOLE CARDS
dealt to hork42 [Js Qs]
pokerluv: folds
Geor19087: folds
jonathon: calls $1
Norbi14: folds
player98: raises $2
xenophon: folds
Engek1: folds
zulu: folds
hork42: calls $1
jonathon: calls $1
FLOP
[7d Kc Th]
Comicus_1 joins the table at seat #10
hork42: checks
jonathon: checks
player98: bets $1
hork42: raises $2
jonathon: folds
player98: raises $2
hork42: raises $2
player98: calls $1
TURN
[7d Kc Th][5h]
hork42: checks
player98: bets $2
hork42: calls $2
RIVER
[7d Kc Th 5h][9d]
hork42: checks
player98: bets $2
hork42: raises $4
player98: raises $4
hork42: raises $4
player98: raises $4
hork42: raises $4
player98: raises $4
hork42: raises $4
player98: calls $2
SHOW DOWN
hork42: shows [Js Qs] (A Straight, King high)
player98: mucks hand
hork42 collected $48 from Main pot
SUMMARY
Total pot $50.50 Main pot $48 | Rake $2.50
Board [7d Kc Th 5h 9d]
Seat 1: Geor19087 folded before Flop (didn't bet)
Seat 2: jonathon folded on the Flop
Seat 3: Norbi14 folded before Flop (didn't bet)
Seat 4: player98 mucked
Seat 5: xenophon folded before Flop (didn't bet)
Seat 6: Engek1 (button) folded before Flop (didn't bet)
Seat 7: zulu (small blind) folded before Flop (didn't bet)
Seat 8: hork42 (big blind) showed [Js Qs] and won ($48) with A Straight, King high
Seat 9: pokerluv folded before Flop (didn't bet)
hork.
This one happened today.
Game #83159554: Texas Hold'em Limit ($1/$2) - 2004/08/05 - 16:19:57 (EST)
Table "Amethysts" Seat 6 is the button.
Seat 1: Geor19087 ($80.25 in chips)
Seat 2: jonathon ($118.50 in chips)
Seat 3: Norbi14 ($62.50 in chips)
Seat 4: player98 ($36 in chips)
Seat 5: xenophon ($105.25 in chips)
Seat 6: Engek1 ($61.25 in chips)
Seat 7: zulu ($20 in chips)
Seat 8: hork42 ($69 in chips)
Seat 9: pokerluv ($28.50 in chips)
zulu: posts small blind $0.50
hork42: posts big blind $1
HOLE CARDS
dealt to hork42 [Js Qs]
pokerluv: folds
Geor19087: folds
jonathon: calls $1
Norbi14: folds
player98: raises $2
xenophon: folds
Engek1: folds
zulu: folds
hork42: calls $1
jonathon: calls $1
FLOP
[7d Kc Th]
Comicus_1 joins the table at seat #10
hork42: checks
jonathon: checks
player98: bets $1
hork42: raises $2
jonathon: folds
player98: raises $2
hork42: raises $2
player98: calls $1
TURN
[7d Kc Th][5h]
hork42: checks
player98: bets $2
hork42: calls $2
RIVER
[7d Kc Th 5h][9d]
hork42: checks
player98: bets $2
hork42: raises $4
player98: raises $4
hork42: raises $4
player98: raises $4
hork42: raises $4
player98: raises $4
hork42: raises $4
player98: calls $2
SHOW DOWN
hork42: shows [Js Qs] (A Straight, King high)
player98: mucks hand
hork42 collected $48 from Main pot
SUMMARY
Total pot $50.50 Main pot $48 | Rake $2.50
Board [7d Kc Th 5h 9d]
Seat 1: Geor19087 folded before Flop (didn't bet)
Seat 2: jonathon folded on the Flop
Seat 3: Norbi14 folded before Flop (didn't bet)
Seat 4: player98 mucked
Seat 5: xenophon folded before Flop (didn't bet)
Seat 6: Engek1 (button) folded before Flop (didn't bet)
Seat 7: zulu (small blind) folded before Flop (didn't bet)
Seat 8: hork42 (big blind) showed [Js Qs] and won ($48) with A Straight, King high
Seat 9: pokerluv folded before Flop (didn't bet)
hork.
Comments
Wonder what he had... J8? KK? 72?
Perhaps the bizzare flop play confused him?
FLOP
[7d Kc Th]
Comicus_1 joins the table at seat #10
hork42: checks
jonathon: checks
player98: bets $1
hork42: raises $2 (huh?)
jonathon: folds
player98: raises $2
hork42: raises $2 (HUH?)
player98: calls $1
I'll have what he's having.
ScottyZ
Normally I wouldn't continue the draw heads up with the pot that small, but I knew that if I did get the straight I could get a lot of bets out of this guy, which is why I decided to stay in. I can't really explain my second raise though...I think I may have tried to build the pot to make it correct to draw on the turn
hork.
ScottyZ