I'm thinking of selling my E-PL1 and getting a Sony NEX-5.
I played around with the NEX-5 in a store and was somewhat impressed. E-PL1 as well. I would definitely choose the Sony based on that limited trial.
But if I am going to buy a Sony camera I think it would be the newly announced A55. Very interesting for
only $750.
Sony A55 - key specifications
16.2MP (effective) APS HD CMOS sensor
Fixed, pellicle-type semi-translucent mirror
Maximum ISO 12,800 (with a quasi-ISO 25,600 'Multi-frame NR' option)
15-point phase-detection AF array with 3 cross-type AF points
Electronic viewfinder with 1.15 million dot resolution
Built-in GPS
Electronic level in EVF/LCD with pitch/roll indicator
Dual-purpose Memory Stick/SD card slot
10fps continuous shooting rate
1080p AVCHD movie mode with continuous AF
Articulated 3in 'TruBlack' LCD with 912k dots
socket for external microphone
2x magnification mode in live view
Face-detection AF (focus via nearest phase-detection AF point)