Here is a great e-currency exchange service: exchangex.ru. This service works with paypal, webmoney and skrill. Current exchange rates:

WebMoney -> PayPal
5.4% for USD and 6.9% for EUR
1 WMZ/33.5 WMR -> 0.9460 USD
1 WMZ/33.5 WMR -> 0.6896 EUR
1 WME -> 1.2298 USD
1 WME -> 0.9310 EUR
PayPal -> WebMoney
11.3% for USD and 11.4% for EUR
1 USD -> 0.8870 WMZ
1 USD -> 28.3840 WMR
1 EUR -> 1.1518 WMZ
1 EUR -> 37.6550 WMR
WebMoney -> Skrill
8.6% for USD and 7.7% for EUR
1 WMZ/33.5 WMR -> 0.9140 USD
1 WMZ/33.5 WMR -> 0.6837 EUR
1 WME -> 1.1882 USD
1 WME -> 0.9230 EUR
Skrill -> WebMoney
14.4% for USD and 16.5% for EUR
1 USD -> 0.8560 WMZ
1 USD -> 27.3920 WMR
1 EUR -> 1.0855 WMZ
1 EUR -> 35.4875 WMR

Also there is an affiliate program:
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