There are some new prepaid data add-ons or standalone packages available in Romania.
Vodafone
EUR4/month for unlimited Vodafone Live! browsing and 500MB of internet access
Internet pe mobil - Vodafone.ro
ZAPP
EUR14 (3G SIM + 2 months unlimited usage with a 3GB/month fair usage clause)
3G Internet SIM card | ZAPP
EUR140 (3G USB modem + 3G SIM +12 months unlimited usage with a 3GB/month fair usage clause)
Internet without subscription | ZAPP
Orange
EUR6/month for 500MB of internet access
Orange Romania - Orange PrePay
VladS
Mobile phones: iPhone 5, Blackberry 9900, Nexus S, Samsung S3322 duos
Mobile data cards: Huawei E587u-5, Huawei E583c, Huawei E160
Postpaid SIMs: CA: Fido, Wind; INTL: Telna
Prepaid SIMs: DE: Fonic, Lidl; AT: yesss!, bob; UK: O2; US: AT&T; RO: Orange, Vodafone; FR: b&you, Lycamobile; NL: Lycamobile; BE: Lycamobile, Jim Mobile; CL: Entel; MX: Telcel; INTL: eKit Blue, eKit Yellow
Dead SIMs: too many to list