Good swimming AO, other than SLwim?

All right, I accepted the challenge and did just that! I took a freebie flight assist script, threw in some swimming animations, fiddled with the forces, and came up with a swimming attachment that works on my land. It's not as slick as SLwim, but it's good enough for me. No sound or particle effects, but I can adjust the swimming speed so I don't have to race as fast as SLwim makes me do. I'll probably keep playing with it, to add sound effects, ability to change strokes, etc. But for now I have what I wanted: I can swim on MY land, in MY lake.