I too bricked my galalxy pop when updating firmware from DDKA7 to KC1 through Kies. During the update process, the progress stuck at 50% and it didn't complete even after hours..I had to disconnect the cable and tried to update again...unfortunately my phone bricked and did not start at all showing "pc-!-mobile" screen.
Then I googled a lot and found a way to recover my phone. Recover mode was not working in my phone, but download mode was still working...thank god.
what I did exactly is entering into download mode: By pressing volume down + power button + home (middle button).
Go to samfirmware and get the firmware files. link is
Login - www.SamFirmware.com
we need to register first then download OPS file and firmware file. I chose KC2 update for europe because that seemed like up-to-date firmware.
Then downloaded S5570_Odin Multi Downloader v4.38.exe.
Now connected the phone in download mode to pc's USB port then launched Odin.
Odin detects device and one COM port on the top left corner turned yellow. Now browse for the OPS file downloaded and respective firmware files like PDA, CSC, PHONE, MODEM etc. Click start.. within 10 minutes it shows up a PASS message turning into green color. During the flashing process mobile restarts and now the phone is up and working perfectly. I noticed slightly better performance than my previous firmware.
The only thing I disappointed is I lost indian firmware Galaxy Pop and by installing european version my mobile turned into Galaxy Mini as it is the international name for S5570. Later I found that it is the ROM made for Red Bull mobile, though working fine with my Airtel 3G.
When my phone bricked I thought that my phone became a permanent brick, but later came to know that its partially bricked. Anyhow, I got my phone back to working condition. From the information I have gone through on the net.. there is no solution to recover a hardware bricked phone...the only way is to replace some part of the motherboard chip..I think an expert technician can do that and bring back the phone alive.
Hope you too can recover your phone if your download mode is working.
There is a lot of information on internet to recover bricked android phones...I thank everybody who is contributing their knowledge and giving information and instructions to help others.
Wish you good luck.